Casio GAX-100 Watch User Manual

General Information

Important Information Before Use

Battery

The battery installed at the factory may discharge during shipping and storage. If you notice signs of insufficient power (dim display), replace the battery at an authorized CASIO service center or dealer.

Water Resistance

For all categories of watches, it is prohibited to: press buttons underwater; adjust the crown underwater; unscrew the crown underwater. If the watch is exposed to salt water, rinse it thoroughly and wipe it dry. Do not wear a watch with a leather strap while swimming. Avoid prolonged contact of leather straps with water.

Notes:

• 1. Not water-resistant. Avoid all contact with water.
• 2. WR (Water Resistant) means water-resistant according to ISO 2281. Brief contact with water will not cause problems.
• 3. 5 Bar (50 meters) water resistance means the watch can withstand water pressure of the indicated value and can be used while showering and for brief swimming.
• 4. 10 Bar (100 meters) water resistance means the watch can be used for normal swimming and snorkeling.
• 5. 20 Bar (200 meters) water resistance means the watch can be used for scuba diving (excluding depths requiring a helium-oxygen mixture).

Watch Care

Do not expose the watch to extreme temperatures. While designed for active daily use, handle the watch with care and avoid drops. Do not fasten the strap too tightly; a finger should fit between your wrist and the strap. Clean the watch and strap with a dry, soft cloth, or a soft cloth dampened with a water solution of mild neutral detergent. Never use volatile agents (e.g., gasoline, solvents, spray cleaners, etc.). Store the watch in a dry place when not in use. Avoid exposing the watch to gasoline, cleaning solvents, spray aerosols, adhesives, paint, etc., as chemical reactions can damage gaskets, cases, and finishes. Some models feature silk-screened designs on the strap; clean these carefully to avoid damaging the graphics.

Plastic Bands

You may notice a white powdery substance on the band. This substance is harmless to your skin or clothing and can be easily removed by wiping with a cloth. Exposure of plastic bands to sweat or moisture, or storing them in humid conditions, can lead to damage, tearing, or cracking. To ensure a long service life for plastic bands, wipe them clean of dirt and water with a soft cloth whenever possible.

Fluorescent Cases and Bands

Prolonged exposure to direct sunlight may cause the fluorescent coloring to gradually fade. Prolonged contact with moisture may also cause the fluorescent coloring to gradually disappear. If any moisture gets on the watch surface, wipe it off as soon as possible. Prolonged contact with any other wet surface may cause discoloration of the fluorescent coloring. Check that moisture is removed from the fluorescent surface and avoid contact with other surfaces.

Condensation

If condensation forms on the inside of the glass due to significant temperature changes, this is a normal physical phenomenon and not a defect.

Manufacturer Disclaimer

CASIO COMPUTER CO., LTD. is not responsible for any damage that may occur from the use of this watch and does not accept any claims from third parties.

Getting to Know Your Watch

Congratulations on your choice of a CASIO watch. To get the most information from your watch, please read this manual carefully.

Important Notes

The measurement functions built into the watch are not intended for measurements requiring professional or industrial accuracy. Values obtained from the watch should be considered approximate. The displayed moon phases and tide graphs are not intended for navigation. Use specialized instruments and devices for accurate navigation data. Do not use this watch for precise tide calculations. The graphs generated by the watch should be considered approximate.

About This Manual

Depending on the watch model, the display may show dark characters on a light background (Type A) or light characters on a dark background (Type B). This manual uses Type A examples for all screen illustrations. Buttons are labeled with letters as shown in the illustration.

Diagram Description: Shows a watch face with buttons labeled A, B, C, D. Two display types are shown: Type A (dark characters on light background) and Type B (light characters on dark background). This manual uses Type A examples.

Each section of this manual provides information necessary for operations in the specified mode. For more detailed information about the watch's features, refer to the "Technical Specifications" section.

Timekeeping Mode

The Timekeeping Mode allows you to set the current time and date. In Timekeeping Mode, press button A to display date or time information on the lower screen.

Diagram Description: Shows the Timekeeping Mode screen. Displays show date (e.g., THU 6-30 36) and time (e.g., 10:08 36). Seconds are displayed separately. Day of the week is shown.

Switch between modes using button C. To return to Timekeeping Mode from any other mode, press and hold button C for about 3 seconds. Press button B to illuminate the dial in any mode (except setting mode).

Setting the Current Time and Date

1. In Timekeeping Mode, press and hold button A for about 2 seconds until the SET indicator starts flashing on the lower digital screen. This indicates that the watch has entered the setting mode.
2. Use buttons D and B to select the city code for your current location. Select the desired city code before setting other parameters.
3. Use button C to select the parameter you want to set, in the following sequence: City Code → DST → 12/24-Hour Format → Seconds → Hours → Minutes → Year → Month → Day.
4. When the indicator for the desired parameter starts flashing, use buttons D or B to adjust it as shown in the table.
5. Press button A to exit the setting mode. The day of the week is displayed automatically according to the set date (year, month, and day).

Diagram Description: Shows button operations for setting Timekeeping Mode. Steps include pressing A to enter SET mode, using D/B to select city code (e.g., TYO), using C to cycle through parameters (City Code, DST, 12/24H, Sec, Hr, Min, Year, Month, Day), and using D/B to adjust values. Example adjustments shown for City Code, DST (ON/OFF), 12/24H format, Seconds reset, Hours/Minutes adjustment, Year/Month/Day adjustment, Alarm tone (ON/OFF), and backlight duration (1.5s/3s).

Setting Daylight Saving Time (DST)

Daylight Saving Time is 1 hour ahead of standard time. Note that DST is not used in all countries or regions.

1. In Timekeeping Mode, press and hold button A for about 2 seconds until the SET indicator starts flashing.
2. Press button C to display the DST setting screen (DST indicator appears).
3. Use button D to turn DST on (ON indicator appears) or off (OFF indicator appears). The default setting is OFF.
4. Press button A to exit the setting mode. The DST indicator appears on the screen when DST is on.

Diagram Description: Shows the DST setting screen. Button D is used to toggle DST ON or OFF.

12/24-Hour Timekeeping Format

In the 12-hour format, the PM indicator appears on the lower digital screen for times between 12:00 PM and 11:59 PM, and does not appear for times between 12:00 AM and 11:59 AM. In the 24-hour format, times are displayed from 0:00 to 23:59, with no PM indicator.

The 12/24-hour format setting is performed in Timekeeping Mode. The selected format applies to all other modes.

Thermometer Mode

This watch has a built-in thermometer sensor to measure ambient temperature.

Measuring Ambient Temperature

1. In Timekeeping Mode, press button D to enter Thermometer Mode and start temperature measurement. The first measurement result appears on the screen after 3 seconds. The sensor then measures temperature every 2 seconds for the first 2 minutes, and then every 2 minutes. The new value is displayed after each measurement.
2. To return to Timekeeping Mode and stop temperature measurement, press button D.

Diagram Description: Shows Thermometer Mode. Button D is used to enter/exit the mode. The screen displays temperature (e.g., 25.5°C).

The watch will automatically stop measuring temperature and return to Timekeeping Mode if no operations are performed in Thermometer Mode for 1-2 hours.

Temperature is displayed in units of 0.1°C (or 0.2°F). A °C (or °F) indicator appears if the measurement result is outside the range of -10.0 to 60.0°C (14.0 to 140.0°F). The measurement result will be displayed again once it falls within the specified range.

Thermometer Precautions

Temperature measurement is affected by body heat (when worn on the wrist), direct sunlight, and humidity. For more accurate readings, remove the watch from your wrist and place it in a well-ventilated area away from direct sunlight. After 20-30 minutes, the watch case temperature will stabilize with the ambient temperature.

Selecting Temperature Units

Perform the following steps to change the temperature unit in Thermometer Mode.

Important Note: If the city code is set to TOKYO, the temperature unit is automatically set to °C (Celsius) and cannot be changed.

1. In Thermometer Mode, go to the temperature sensor calibration screen (refer to "Temperature Sensor Calibration").
2. Press button C to display the temperature unit setting screen. The currently set unit (°C or °F) will flash.
3. Use button D to select the temperature unit: °C (Celsius) or °F (Fahrenheit).
4. Press button A to exit the setting mode.

Diagram Description: Shows the process of changing temperature units, using button C to access the unit screen and button D to select °C or °F.

Temperature Sensor Calibration

The built-in temperature sensor is factory calibrated and normally does not require further adjustment. If serious temperature measurement errors occur, you can calibrate the sensor.

Caution: Incorrect calibration will lead to inaccurate measurements. Read this section carefully before performing any calibration.

Before calibrating, compare the watch's readings with a reliable and accurate thermometer.

If calibration is necessary, remove the watch from your wrist and wait 20-30 minutes for the watch case temperature to stabilize with the ambient temperature.

1. Switch the watch to Thermometer Mode. The temperature sensor will begin measuring ambient temperature, and the result will be displayed.
2. Press and hold button A for about 2 seconds. The "Hold" indicator will appear. Release button A when the "Hold" indicator disappears.
3. The flashing temperature value on the screen indicates that the watch has entered sensor calibration mode.
4. Use button D (+) or B (-) to adjust the temperature value to match the reading from another instrument. Each press of D or B changes the value by 0.1°C (0.2°F). To return to factory settings, press both D and B simultaneously. The indicator will display "OFF" for 2 seconds, then the original temperature value.
5. Press button A to return to Thermometer Mode and start measuring ambient temperature.

Diagram Description: Shows the calibration process. Press and hold A to enter calibration, then use D/B to adjust the temperature value.

Tide/Moon Phase Mode

The Tide/Moon Phase Mode is used to view current tide, moon phase, and moon age information. The calculations are based on the city code of your current location. To view information for another location, change the city code setting.

Important Note: The tide, moon phase, and moon age information provided by this watch is approximate and for reference only. Never use this data for navigation or for situations requiring precise measurements.

Viewing Current Tide Level and Moon Phase

In Timekeeping Mode, the current tide level and moon phase are displayed.

Diagram Description: Shows the Timekeeping Mode screen displaying tide level (HIGH/LOW) and moon phase indicator. Also shows Moon Age (e.g., 28.7-29.8) and date/day.

Note: The accuracy of moon age calculation is ±1 day. If data is displayed incorrectly, check the Timekeeping Mode settings for your city code. If it remains incorrect, perform the procedures in "Tide Time Correction" and "Reversible Moon Phase Indicator".

Diagram Description: Shows examples of moon phases and their corresponding indicators. Also shows tide levels (HIGH/LOW) and moon age ranges.

Viewing Tide, Phase, and Moon Age for a Specific Date and Time

In Tide/Moon Phase Mode, you can view tide, phase, and moon age information for a selected date and time. Moon age is not displayed in Timekeeping Mode.

1. Switch to Tide/Moon Phase Mode. The screen will display tide information for 6:00 AM of the current date.
2. Use button D to set the time for which you want to view tide information. Each press of D changes the time by one hour. The tide information changes accordingly. Press and hold D for about 2 seconds to scroll through times rapidly.
3. Press button A to display moon phase and moon age information for the current date.
4. Use button D to set the desired time and date. Each press of D changes the date by one day. Tide, moon phase, and moon age information changes accordingly. Press and hold D for about 2 seconds to scroll through dates rapidly. The date can be set from January 1, 2000, to December 31, 2099.
5. Press button A again to return to the tide information screen.

Diagram Description: Shows switching to Tide/Moon Phase Mode. Button D is used to adjust time and date. Button A is used to switch between tide and moon phase displays.

Tide Time Correction

Use this section to correct the tide time for a specific date. Tide times for your location can be found in tide tables, online, or other media.

1. In Tide/Moon Phase Mode, press button A to go to the moon phase and moon age screen.
2. Use button D to select the date for which you need to correct the high tide time.
3. Press and hold button A until the hour value starts flashing.
4. Use buttons D (+) and B (-) to set the hour.
5. After setting the hour, press button C. The minute value will start flashing.
6. Use buttons D (+) and B (-) to set the minute.
7. After setting the minute, press button A to return to Tide/Moon Phase Mode.

Diagram Description: Shows the process for correcting tide times, involving setting hours and minutes.

To return to factory settings during tide time correction (steps 4-7), press both D and B simultaneously. Consider DST settings when correcting tide times. If there are two high tides on a given date, correct the first one; the second will be adjusted automatically.

Reversible Moon Phase Indicator

The actual appearance of the moon depends on the viewing perspective from the Northern or Southern Hemisphere.

Use this section to set the reversible moon phase indicator for your location according to its actual appearance.

1. In Tide/Moon Phase Mode, press and hold button A until the hour value starts flashing.
2. Press button C twice. The moon phase indicator will start flashing, indicating that the watch is in moon phase indicator setting mode.
3. Use button D to set the moon phase indicator. Set indicator #5 for Southern Hemisphere display, and indicator #4 for Northern Hemisphere display.
4. Press button A to return to Tide/Moon Phase Mode.

Diagram Description: Shows setting the moon phase indicator, using button D to select between Northern (indicator #4) and Southern (indicator #5) hemisphere views.

Countdown Timer Mode

The Countdown Timer Mode allows you to set a countdown from 1 minute to 24 hours. An alarm sounds when the countdown reaches zero.

All operations in this section are performed in Countdown Timer Mode, accessed via button C.

Using the Countdown Timer

To start the countdown, press button D in Countdown Timer Mode. When the countdown reaches zero, an alarm will sound for 10 seconds. After the alarm stops, the timer resets to its starting time.

Diagram Description: Shows Countdown Timer Mode. Button D starts/stops the timer. Button A pauses/resumes. Button A also cancels. The screen shows the countdown time.

Press button D during a countdown to pause it. Press D again to resume. To cancel the countdown, pause it (press D) then press A. This resets the timer to its starting time.

Setting the Countdown Timer

1. In Countdown Timer Mode, press and hold button A for about 2 seconds until the hour value starts flashing. This indicates the timer setting mode.
2. Press button C to select the hours or minutes parameter and set the desired value.
3. Press button A to exit the setting mode.

Diagram Description: Shows setting the countdown timer hours and minutes using buttons A, C, and D/B.

Stopwatch Mode

The Stopwatch Mode allows you to measure elapsed time and split times.

The measurement limit is 999 hours, 59 minutes, 59.99 seconds. Measurement continues until stopped. If the limit is reached, the stopwatch restarts from zero until stopped. Measurements continue even if the watch exits Stopwatch Mode.

If the watch exits Stopwatch Mode while a split time is displayed, that value will be replaced by the total elapsed time.

All operations in this section are performed in Stopwatch Mode, accessed via button C.

Measuring Elapsed Time

In Stopwatch Mode, use button D to start and stop elapsed time measurement. Press button A during elapsed time measurement to pause the stopwatch and display the split time. Pressing A again resumes elapsed time measurement. To stop the stopwatch and display the total elapsed time, press button D.

Diagram Description: Shows Stopwatch Mode operations. D starts/stops. A splits/resumes. A also shows split times. D stops and shows total time.

Elapsed or split time measurement continues even if the watch exits Stopwatch Mode.

World Time Mode

The World Time Mode displays the current time for one of 48 cities (29 time zones) worldwide. The time displayed in World Time Mode is synchronized with the time set in Timekeeping Mode. If World Time is displayed incorrectly, ensure the correct city code is set and the Timekeeping Mode time is correct.

Time in World Time Mode is calculated as an offset from UTC. Refer to the "City Code Table" for details.

All operations in this section are performed in World Time Mode, accessed via button C.

Viewing Current World Time

In World Time Mode, use button D to select the desired city code (time zone). Press and hold D to scroll through the city codes rapidly. The time for the selected city code will be displayed on the lower screen. To select the UTC city code, press both buttons B and D simultaneously.

Diagram Description: Shows World Time Mode. Button D selects city codes (e.g., NYC). Button A displays the date for the selected city. Buttons B+D select UTC.

Press button A to display the date for the selected city code (time zone). The date will appear on the screen for about 1 second, then the current world time will be displayed again.

Setting Standard/Daylight Saving Time for World Time City Code

1. In World Time Mode, use button D to select the city code for which you want to change the standard/daylight saving time setting.
2. Press and hold button A for about 2 seconds to enable DST (DST indicator appears) or standard time (DST indicator does not appear). Press and hold button A until the "Hold" indicator appears, then release it when "Hold" disappears.

The DST indicator appears on the World Time screen when DST is enabled.

You cannot set standard/daylight saving time for the UTC city code.

Changing standard/daylight saving time for a world time city code that is also set as your current location's city code in Timekeeping Mode will also change the standard/daylight saving time setting for that city code in Timekeeping Mode.

Quick Swap of Current Time and World Time

Perform the following steps to quickly swap your current location's city code with a city code selected in World Time Mode. This function is useful for people who frequently travel between time zones.

1. In World Time Mode, use button D to select the desired city code (time zone).
2. Press and hold both buttons A and B until an audible beep is heard. This action will swap the current location city code with the selected world time city code. The watch hands will display the current time for this new location. The world time city code will be replaced by the former current location city code, and its time will be displayed on the lower screen. After step 2, the watch remains in World Time Mode. The city code displayed at the top was the original current location city code.

Diagram Description: Shows the quick swap function. Pressing A+B simultaneously swaps current time and world time city codes.

Alarm Mode

When an alarm is enabled, it sounds at the set time, regardless of the watch's mode. The watch has 4 daily alarms without snooze (AL1-AL4) and 1 snooze alarm (SNZ). It also has an hourly chime (SIG).

All operations in this section are performed in Alarm Mode, accessed via button C.

Setting Alarm Times

1. In Alarm Mode, use button D to select the alarm screen you want to set (AL1, AL2, AL3, AL4, SNZ, or SIG).
2. Press and hold button A for about 2 seconds until the time value starts flashing. This indicates the alarm setting mode.
3. Use button C to select the parameter to set (hours or minutes).
4. Use buttons D (+) and B (-) to set the desired value.
5. Press button A to exit the setting mode.

Diagram Description: Shows Alarm Mode. Button D selects alarms (AL1-AL4, SNZ, SIG). Button A enters setting mode. Button C cycles between hours and minutes. Buttons D/B adjust values.

For the snooze alarm, the snooze function repeats every 5 minutes.

Checking Alarms

In Alarm Mode, press and hold button D until an audible beep is heard. This checks the alarm sound.

Enabling and Disabling Alarms

1. In Alarm Mode, use button D to select the alarm screen you want to enable or disable.
2. Press button A to toggle the alarm sound on or off. The indicator for the enabled alarm (AL1, AL2, AL3, AL4, or SNZ) appears on the corresponding alarm screen. The alarm indicator is displayed on the watch screen in all modes when the alarm is on. The indicator flashes when the alarm is sounding. The snooze alarm indicator flashes during the alarm and during the 5-minute snooze interval.

Diagram Description: Shows enabling/disabling alarms. Pressing A toggles the alarm ON/OFF, indicated by an icon.

Enabling and Disabling Hourly Chime

1. In Alarm Mode, use button D to select the hourly chime setting screen (SIG).
2. Press button A to toggle the hourly chime on or off. The indicator for the enabled hourly chime appears on the watch screen in all modes when this function is on.

Diagram Description: Shows enabling/disabling hourly chime. Pressing A toggles the chime ON/OFF, indicated by an icon.

Alarm Operation

The alarm sounds for 10 seconds at the set time, regardless of the watch's mode. If the snooze alarm is active, it will repeat 7 times every 5 minutes or until it is turned off. Alarm signals and the hourly chime operate according to the time set in Timekeeping Mode. Press any button to stop the alarm sound. Performing any of the following operations within the 5-minute snooze interval will cancel the alarm: setting the time in Timekeeping Mode; setting the snooze alarm (SNZ).

Backlight

The watch uses an LED for illumination, making it easy to read the time in the dark. It also features an auto-backlight function that activates when the watch is tilted towards you.

For the auto-backlight to function, this feature must be enabled (the auto-backlight indicator is displayed on the screen).

Diagram Description: Shows the backlight function. Button B activates the backlight. The LT indicator shows auto-backlight is on.

For more information on the backlight, refer to the "Additional Backlight Information" section.

Turning On the Backlight

In any mode, press button B to turn on the screen backlight. This will illuminate the watch screen regardless of whether auto-backlight is enabled.

Setting Backlight Duration

The backlight duration can be set to 1.5 or 3 seconds.

1. In Timekeeping Mode, press and hold button A for about 2 seconds until the SET indicator starts flashing.
2. Press button C 10 times to go to the backlight duration setting screen (the lower screen will display a flashing indicator for 1 or 3).
3. Press button D to select the backlight duration: 3 seconds (indicator 3 appears) or 1.5 seconds (indicator 1 appears).
4. Press button A to exit the setting mode.

Diagram Description: Shows setting backlight duration. Button C cycles to the setting screen, button D selects 1.5s or 3s.

Auto-backlight

When the auto-backlight function is on, it activates whenever the watch is tilted towards you in any mode, as shown in the illustration.

Diagram Description: Shows how to activate auto-backlight. Tilt the watch towards you at an angle of approximately 40 degrees. Wear the watch on the outer side of your wrist.

The auto-backlight turns off automatically 6 hours after activation to conserve battery power. To re-enable auto-backlight, repeat the above procedure.

The auto-backlight turns off automatically after a set duration (1.5 or 3 seconds), even if the watch face is tilted towards you.

Static electricity or magnetic fields may interfere with the proper operation of the auto-backlight. If the backlight does not turn on, return the watch to its original position (parallel to the ground), then tilt it towards you again. If this does not help, lower your hand along your body, then try again.

A very faint clicking sound may be heard when the backlight turns on. This is the mechanical sound of the auto-backlight activating and does not indicate a malfunction.

Analog Time Adjustment

The analog hands may become misaligned due to magnetic interference or impact. In such cases, you need to adjust their home position.

1. In Timekeeping Mode, press and hold button D for about 5 seconds until the H-SET indicator appears on the upper digital screen and the Sub indicator flashes on the lower digital screen.
2. Check the home position of the tide information hand. Its home position is when it points to the 12 o'clock mark. If it is not, use buttons D (+) and B (-) to move it to the 12 o'clock mark. After adjusting the tide hand, press button C.
3. Check the home position of the hour and minute hands. Their home position is the 12 o'clock mark. If they are not, use buttons D (clockwise) and B (counter-clockwise) to move the hands to the 12 o'clock mark. After adjusting the hour and minute hands, press button A to return to the current time display.

Diagram Description: Shows the analog time adjustment screen. H-SET and Sub indicators are shown. Buttons D/B adjust the tide hand, then button C is pressed. Then D/B adjust hour/minute hands, then button A returns to time display.

This action will return the watch to Timekeeping Mode. The hour and minute hands will return to displaying the current time, and the tide information hand will point to the HIGH mark. To cancel the adjustments, press button C.

Reference Information

This section contains additional technical information about the watch, as well as precautions and information about various features and functions.

Button Tone

The button tone can be turned on or off. Enabling or disabling the button tone does not affect other audible signals such as alarms or the hourly chime.

1. In Timekeeping Mode, press and hold button A for about 2 seconds until the SET indicator starts flashing.
2. Press button C 9 times to go to the button tone setting screen (the screen will display the KEY or MUTE indicator).
3. Press button D to turn the button tone on (KEY indicator appears) or off (MUTE indicator appears).
4. Press button A to exit the setting mode. The MUTE indicator is displayed on the watch screen in all modes when the button tone is off.

Diagram Description: Shows setting button tone. Button C cycles to the setting screen, button D selects KEY (on) or MUTE (off).

Auto Return

If no operations are performed during setting for 2-3 minutes, the watch will automatically exit the setting mode. If no operations are performed in a mode for the time specified in the table, the watch will automatically return to Timekeeping Mode.

Technical Specifications

Accuracy at Normal Temperature: ±15 seconds per month

Timekeeping: Hour, minute, second, AM/PM, month, day, day of week

Time Format: 12-hour and 24-hour formats

Calendar System: Fully automatic calendar programmed from 2000 to 2099

Other: City code selection (48 codes available); Daylight Saving Time/Standard Time

Analog Time: Hour, minute (hands move every 20 seconds)

Thermometer:

• Measurement Range: -10 to +60°C (14 to 140°F)
• Unit of Measurement: 0.1°C (0.2°F)
• Measurement Interval: Every 2 seconds for the first 2 minutes, then every 2 minutes
• Other: Sensor calibration, manual measurement (via buttons)
• Measurement Accuracy: ±2°C (±3.6°F) in the range of -10 to +60°C (14 to 140°F)

Tide/Moon Phase: Moon phase indicator display for current or specified date and time; Moon age

Other: Tide time correction; Reversible moon phase indicator

Stopwatch:

• Unit of Measurement: 1/100 second
• Measurement Limits: 999:59'59.99"
• Measurement Accuracy: ±0.0006%
• Measurement Modes: Total time, split time

Countdown Timer:

• Unit of Measurement: 1 second
• Timer Setting Range: 1 minute to 24 hours (in 1-minute increments)

World Time: 48 cities (29 time zones)

Other: Daylight Saving Time/Standard Time, Quick swap of current time and world time

Alarm: 5 daily alarms (1 with snooze); Hourly chime

Backlight: LED; Auto-backlight; Backlight duration setting

Other: Button tone on/off

Power: 2 Silver Oxide Batteries (SR927W)

Approximate Battery Life: 3 years under the following conditions: 1 backlight operation (1.5 sec) per day, 10 seconds of alarm operation per day. Frequent backlight use reduces battery life.

City Code Table

Current time in Timekeeping Mode and World Time Mode is displayed with an offset from Coordinated Universal Time (UTC).

Precautions for Backlight Use:

• Backlight is difficult to see in direct sunlight.
• Backlight automatically turns off when any alarm sounds.
• Backlight duration depends on its setting (1.5 or 3 seconds).
• Frequent backlight use reduces battery life.

Precautions for Auto-backlight Use:

• If the watch is worn on the inside of the wrist, hand movements or vibrations may cause frequent backlight activation. To prevent battery drain, turn off the auto-backlight function in situations that may cause frequent activation.
• The backlight will not activate if the watch face is tilted more than 15° from horizontal. Ensure your hand is parallel to the ground.

Note: Data is as of January 2016. The watch does not account for the -03.00 time offset for SCL (Santiago). Therefore, always apply Daylight Saving Time for this city code setting.

Rules regarding world time (offset from UTC) and daylight saving time vary by country. As of June 2011, Russia abolished the transition to daylight saving time. Federal Law "On Amendments to the Federal Law 'On Time Calculation'" adopted on July 21, 2014, established 11 time zones in Russia, with most shifted back by one hour as of October 26, 2014. Please consider this information when setting your watch.

Product Information

Product Name: Electronic / Electro-mechanical Quartz Wristwatches (Men/Women)

Brand: CASIO

Manufacturer: CASIO COMPUTER Co., Ltd.

Manufacturer Address: 1-6-2, Hon-machi 1-chome, Shibuya-ku, Tokyo 151-8543, Japan

Importer: CASIO LLC, 127015, Russia, Moscow, Butyrskaya st., bld. 77

Warranty Period: 1 year

Address of Authorized Organization for Claims: Specified in the warranty card