Introduction
This manual provides detailed instructions for the Casio WS-1400H-1BVDF Digital Watch. This timepiece is designed for active individuals, featuring a 60-lap memory, an easy-to-read LCD, a front stopwatch button, 100-meter water resistance, an LED light, and a 10-year battery life. Please read this manual carefully to ensure proper use and to fully utilize all functions of your watch.

Figure 1: Front view of the Casio WS-1400H-1BVDF Digital Watch. This image displays the watch face with its digital display, buttons on the sides, and the black resin band.
Setup
Before using your watch, it is recommended to set the current time, date, and any desired alarms.
Button Functions
- A (ADJUST): Used to enter and exit setting modes, and to confirm settings.
- B (MODE): Cycles through the watch's modes (Timekeeping, Stopwatch, Lap Memory, Timer, Alarm, Dual Time).
- C (LIGHT): Illuminates the display.
- D (START/STOP): Used to start/stop stopwatch or timer operations, and to change settings during setup.
- E (LAP/RESET): Used to record laps in stopwatch mode, and to reset values during setup.

Figure 2: Angled view of the watch, highlighting the placement of the control buttons on the side of the case. These buttons are used for navigating modes and adjusting settings.
Time and Date Setting
- In Timekeeping Mode, press and hold A until the city code starts flashing. This indicates the setting mode.
- Press B to cycle through the settings: City Code → DST (Daylight Saving Time) → 12/24-hour format → Seconds → Hour → Minute → Year → Month → Day.
- Use D and E to change the flashing value. D typically increases the value, and E decreases or resets.
- After setting all desired values, press A to exit the setting mode.
Alarm Setting
- From Timekeeping Mode, press B repeatedly until you reach the Alarm Mode (indicated by 'ALM' or a bell icon).
- Press and hold A until the alarm hour digits start flashing.
- Use D to adjust the hour and E to adjust the minute.
- Press A to confirm and exit the alarm setting mode.
- Press D in Alarm Mode to toggle the alarm ON/OFF.
Operating Instructions
Mode Navigation
Press the B (MODE) button to cycle through the watch's various modes in the following order:
Timekeeping Mode → Stopwatch Mode → Lap Memory Mode → Timer Mode → Alarm Mode → Dual Time Mode
Using the Stopwatch
The stopwatch measures elapsed time, split times, and two finishes. It features a 60-lap memory.
- Enter Stopwatch Mode by pressing B. The display will show 'STW' or '00'00"00'.
- Press D (START/STOP) to start the stopwatch.
- Press E (LAP/RESET) to record a lap time while the stopwatch is running. The lap time will be displayed briefly.
- Press D again to stop the stopwatch.
- Press E to reset the stopwatch to zero.
Lap Memory Recall
To view recorded lap times:
- Enter Lap Memory Mode by pressing B.
- Use D and E to scroll through the stored lap records.
Using the Timer
The timer can be set for a countdown from 1 minute up to 24 hours.
- Enter Timer Mode by pressing B. The display will show 'TMR'.
- Press and hold A until the timer hour digits start flashing.
- Use D and E to set the desired countdown time.
- Press A to confirm the setting.
- Press D to start or stop the countdown.
- When the countdown reaches zero, an alarm will sound. Press any button to stop the alarm.
Using the LED Backlight
Press the C (LIGHT) button to illuminate the display for easy reading in low-light conditions.

Figure 3: The watch display showing the time and date, with the LED backlight activated for visibility in dark environments.
Maintenance
Proper care will ensure the longevity and performance of your Casio WS-1400H-1BVDF watch.
Cleaning
- Wipe the watch with a soft, dry cloth to remove dirt and moisture.
- For resin bands, wash with water and a mild detergent, then rinse thoroughly and dry.
- Avoid using chemical cleaners, as they can damage the watch's materials.
Water Resistance
This watch is 100-meter water resistant. This means it is suitable for swimming, showering, and snorkeling. However, please observe the following precautions:
- Do not operate buttons while the watch is wet or submerged in water.
- Avoid exposing the watch to hot water or steam (e.g., hot showers, saunas), as this can compromise the water resistance seals.
- After exposure to saltwater, rinse the watch with fresh water and wipe it dry.
Battery Replacement
The watch is equipped with a 10-year battery. When the display becomes dim or functions become erratic, it may be time for a battery replacement. It is highly recommended to have the battery replaced by an authorized Casio service center to ensure proper sealing and maintain water resistance.
Storage
When not in use for extended periods, store the watch in a dry, cool place away from direct sunlight and extreme temperatures.
Troubleshooting
If you encounter issues with your watch, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank or dim. | Low battery. | Replace the battery at an authorized service center. |
| Time is incorrect. | Time not set correctly or accidental adjustment. | Refer to the "Time and Date Setting" section to reset the time. |
| Buttons do not respond. | Watch may be in a locked mode or internal malfunction. | Try pressing all buttons firmly. If unresponsive, allow the watch to sit for a few minutes. If the problem persists, contact support. |
| Water inside the display. | Water resistance seals compromised. | Stop using the watch immediately and take it to an authorized service center. Do not attempt to dry it yourself. |
Specifications
Key technical specifications for the Casio WS-1400H-1BVDF Digital Watch:
- Model Number: WS-1400H-1BVDF
- Display Type: Digital
- Movement Type: Quartz
- Case Material: Resin
- Band Material: Resin
- Case Diameter: 44.5 Millimetres
- Case Thickness: 13.4 Millimetres
- Item Weight: 43 Grams
- Water Resistance Depth: 100 Metres (10 ATM)
- Battery Type: 1 Lithium Ion battery (included)
- Battery Life: Approximately 10 years
- Special Features: 60-lap memory, Stopwatch, Timer, Alarm, Dual Time, LED Backlight

Figure 4: The Casio WS-1400H-1BVDF watch worn on a wrist, demonstrating its size and fit.
Warranty and Support
Warranty Information
This Casio WS-1400H-1BVDF Digital Watch comes with an Extended Warranty. Please refer to the warranty card included with your purchase for specific terms, conditions, and duration of coverage.
Customer Support
For technical assistance, service, or warranty claims, please contact Casio customer support:
- Manufacturer: Casio India Co Pvt Ltd
- Address: A-41, 1st Floor, MCIE, Mathura Road, New Delhi-110044, India
- Importer: Casio India Co Pvt Ltd
For the most up-to-date contact information and support resources, please visit the official Casio website for your region.