Casio EFA-124 Watch User Manual

Important Information

Battery

If the display becomes dim or the backlight does not illuminate, the battery needs replacement. Contact a CASIO dealer or distributor. The battery included with your watch is for initial testing and may have a shorter life than standard batteries.

Water Resistance

Watches are classified by water resistance levels (I to V). Refer to the table below to determine usage rules.

Notes:

• I: Not water resistant. Avoid all moisture.
• III: If exposed to saltwater, rinse thoroughly and dry.
• IV: If exposed to saltwater, rinse thoroughly and dry.
• V: Suitable for scuba diving (excluding depths requiring helium-oxygen mixture).

ATTENTION!!! For all watch categories, do not:

• Press buttons underwater.
• Set hands underwater.
• Unscrew the crown underwater.

Important Notes

• Some water-resistant watches have leather straps. Do not wear these watches for swimming or other activities where the strap may get wet.

Watch Care

The gasket that protects the watch from water and dust should be replaced every 2-3 years. If moisture enters the watch, contact a CASIO dealer or distributor immediately. Avoid exposing the watch to extremely high or low temperatures. While designed for normal use, avoid rough handling or dropping. Do not wear the strap too tightly; a finger should fit between your wrist and the strap. Clean the watch and strap using a dry, soft cloth, or a soft cloth dampened with a mild neutral detergent solution. Never use volatile solvents like benzine, thinners, or spray cleaners. Store the watch in a dry place when not in use. Avoid contact with benzine, cleaning solvents, aerosol sprays, adhesives, paint, etc., as chemical reactions can damage gaskets, cases, and polish. Be careful when cleaning straps with silk-screened designs to avoid damaging the print. For resin straps, a white powdery substance may appear; this is harmless and can be wiped off with a soft cloth. Moisture and sweat can damage resin straps over time, leading to breakage or cracking. To ensure longevity, wipe resin straps clean of dirt and moisture frequently. For watches with fluorescent cases and straps, prolonged exposure to direct sunlight or moisture can cause the fluorescent color to gradually fade. Wipe off any moisture from the surface as soon as possible. Prolonged contact with wet surfaces can cause the fluorescent color to fade.

CASIO COMPUTER CO., LTD. is not liable for any damages resulting from the use of this watch and accepts no claims from third parties.

General Description of Operating Modes

The figure shows the watch in the Timekeeping Mode. Pressing button C cycles through the modes in the following sequence: Timekeeping Mode → World Time Mode → Stopwatch Mode → Analog Time Mode → Timekeeping Mode.

Press button B for backlight in any mode.

Timekeeping Mode

In Timekeeping Mode, press button A to switch between the day of the week/date display and the hour/minute display.

Setting Time and Date

1. In Timekeeping Mode, press and hold button A until the Home City code flashes.
2. Use buttons B and D to select your Home City code.
3. Press button C to cycle through settings: Home City Code → Daylight Saving Time (DST) → 12/24 Hour Format → Seconds → Hours → Minutes → Year → Month → Day → Home City Code.
4. If you select seconds (flashing), press button D to reset the seconds count to 00. If you press button D when the seconds count is between 30 and 59, the seconds will reset to 00 and the minutes will increment. If the seconds count is between 00 and 29, the minutes will not change.
5. Use buttons B and D to adjust minutes, etc.
6. Press button D to toggle between 12-hour and 24-hour formats. The 'P' indicator shows PM time.
7. Press button D to turn Daylight Saving Time (DST) ON or OFF. Holding the button allows faster changes.
8. The day of the week is automatically set according to the date.
9. The date can be set from January 1, 2000, to December 31, 2099.
10. Press button A to finish the settings.

Backlight

Press button B in any mode to turn on the backlight. The backlight uses LED panels, and brightness may decrease with prolonged use. A sound may be emitted during illumination; this is normal operation of the vibrating backlight elements and not an indication of malfunction. The backlight is difficult to see in direct sunlight. Frequent use of the backlight reduces battery life.

Analog Time Mode

The analog time is synchronized with the digital time. No manual setting is usually required. However, if the analog time is out of sync with the digital time:

1. In Analog Time Mode, press and hold button A.
2. Use button D to adjust the analog time. Each press of button D advances the time by 20 seconds. Pressing button B while holding D allows faster adjustment. Press any button to stop the rapid adjustment.
3. Press button A to finish the settings.

World Time Mode

This mode allows you to view the local time in any of 48 cities worldwide (29 time zones). World Time values are automatically set according to the current time settings.

Setting Daylight Saving Time (DST)

1. In World Time Mode, select the city code for which you want to set Daylight Saving Time using button D.
2. Press and hold button A to turn DST ON or OFF.

World Time City List

Stopwatch Mode

The Stopwatch Mode allows you to measure elapsed time. The total measuring range is limited to 59 minutes and 59.99 seconds.

Measuring Elapsed Time

Operation: D (Start) – D (Stop) – D (Restart) – D (Stop) – A (Reset)

Alarm Mode

You can set a daily alarm that sounds for 10 seconds when the preset time is reached. If the hourly chime is enabled, a short beep sounds at the top of each hour. You can stop the alarm or chime by pressing any button.

Setting the Alarm Time

1. In Alarm Mode, press and hold button A for 3 seconds. The hour digits will flash, indicating they are selected for setting. The alarm is automatically turned ON at this point.
2. Press button C to cycle through the digits to be set: Hour → Minute.
3. Use buttons D and B to adjust the selected digits. Holding button D while pressing button B allows for faster adjustment. Press any button to stop the rapid adjustment.
4. Press button A to finish the settings.

Alarm Sound Check

In Alarm Mode, press button D to check the alarm sound.

Setting Alarm and Hourly Chime

In Alarm Mode, press button D to cycle through the settings: All ON → All OFF → Alarm Only → Hourly Chime Only.

Setting Button Tone

Press button C in any mode to turn the button tone ON or OFF (indicated by the "MUTE" icon).

Technical Specifications

Product Information