Introduction
Thank you for choosing the Casio F108WH Series Digital Watch. This manual provides essential information regarding the setup, operation, and maintenance of your new timepiece. Designed for durability and functionality, this watch features a digital display, LED backlight, daily alarm, and stopwatch functions, making it suitable for various daily activities.

Image: The Casio F108WHC-4ACF digital watch in red, showcasing its classic square design and digital display.
Key Features
- Iconic Retro-Inspired Design: Features a large square case with rugged resin construction and button guards.
- 50M Water Resistance: Suitable for daily wear, splashes, and brief immersion in water.
- Multifunctional Timekeeping: Includes a 1/100-second stopwatch, 24-hour countdown timer, and world time function.
- LED Backlight: Amber LED backlight for enhanced visibility in low-light conditions.
- Long-Lasting Battery: Powered by a CR2016 battery, providing up to 7 years of continuous operation.
- Accurate Quartz Movement: Delivers accurate timekeeping with an accuracy of ±30 seconds per month.
- Daily Alarm: Features 5 alarms for reminders.
Setup and Initial Configuration
Setting Time and Date
- In the Timekeeping Mode, press and hold the ADJUST button (usually top-left) until the seconds digits start to flash. This indicates the setting screen.
- Press the MODE button (usually bottom-left) to cycle through the settings: Seconds → Hour → Minutes → Year → Month → Day.
- Use the START/STOP button (usually top-right) to increase the flashing value or the LIGHT button (usually bottom-right) to decrease it.
- To switch between 12-hour and 24-hour format, press the START/STOP button while the hour/minute setting is flashing.
- Once all settings are correct, press the ADJUST button to exit the setting screen.
Setting the Daily Alarm

Image: An icon representing an alarm clock, indicating the alarm function.
- From the Timekeeping Mode, press the MODE button to enter the Alarm Mode.
- Press the ADJUST button to select the alarm number (if multiple alarms are available).
- Press and hold the ADJUST button until the hour digits start to flash.
- Use the START/STOP button to set the hour and the LIGHT button to set the minutes.
- Press the ADJUST button to confirm and exit.
- To turn the alarm on/off, press the START/STOP button in the Alarm Mode.
Using the Stopwatch

Image: An icon representing a stopwatch, indicating the stopwatch function.
- From the Timekeeping Mode, press the MODE button repeatedly until you enter the Stopwatch Mode.
- Press the START/STOP button to start the stopwatch.
- Press the START/STOP button again to stop the stopwatch.
- To reset the stopwatch, press the ADJUST button while the stopwatch is stopped.
Operating Modes
Your Casio F108WH watch features several operating modes, which can be accessed by pressing the MODE button (bottom-left). The typical sequence of modes is:
- Timekeeping Mode: Displays the current time, day, and date. This is the default mode.
- Alarm Mode: Allows you to set and activate daily alarms.
- Stopwatch Mode: Used for measuring elapsed time.
- Countdown Timer Mode: (If applicable to your specific model) Used for counting down from a preset time.
Press the LIGHT button (bottom-right) in any mode to activate the amber LED backlight for improved visibility.
Maintenance
Water Resistance

Image: An icon depicting water drops, symbolizing water resistance.
Your Casio F108WH watch is water-resistant up to 50 meters (165 feet). This means it is suitable for daily use, such as hand washing, splashes, and brief immersion in water. It is generally not recommended for swimming, showering, or diving, as prolonged exposure to water pressure or hot water can compromise the seals. Avoid operating buttons while the watch is wet.
Battery Replacement
The watch is powered by a CR2016 battery, designed to last approximately 7 years. When the display becomes dim or functions become erratic, it may be time for a battery replacement. It is recommended to have the battery replaced by a qualified watch technician to ensure proper sealing and maintain water resistance.
General Care
- Clean the watch regularly with a soft, dry cloth. For stubborn dirt, use a slightly damp cloth and mild soap, then wipe dry.
- Avoid exposing the watch to extreme temperatures, direct sunlight for extended periods, or strong magnetic fields.
- Prevent contact with solvents, gasoline, aerosols, or adhesives, as these can damage the resin case and band.
Troubleshooting
| Problem | Solution |
|---|---|
| Display is blank or dim. | The battery may be low. Replace the battery. |
| Incorrect time displayed. | Re-adjust the time and date settings as described in the 'Setup' section. Ensure 12/24-hour format is correct. |
| Buttons do not respond. | The watch may be in a frozen state. Try pressing all buttons simultaneously for a few seconds to reset. If the issue persists, the battery might be completely drained. |
| Alarm does not sound. | Ensure the alarm is set correctly and the alarm function is turned 'ON' in Alarm Mode. |
Specifications
- Model Number: F-108WHC-4ACF
- Case Material: Resin
- Band Material: Resin
- Water Resistance: 50 meters (165 feet)
- Display Type: Digital
- Movement: Quartz
- Battery: 1 x CR2016 (included)
- Battery Life: Approximately 7 years
- Accuracy: ±30 seconds per month
- Product Dimensions: 1.68 x 1.75 x 0.41 inches
- Item Weight: 1.13 ounces
Product Videos
Casio Unisex F-108WHC-4ACF Classic Red Resin Band Watch Overview
Video Description: This video provides a detailed overview of the Casio F-108WHC-4ACF watch, highlighting its design, features, and how it looks on the wrist. It demonstrates the watch's functions and aesthetic appeal.
Casio Brand Video
Video Description: A general brand video from Casio, showcasing the heritage and quality associated with Casio timepieces. This video provides context about the brand's commitment to innovation and durability.
Warranty and Support
For detailed warranty information regarding your Casio F108WH Series Digital Watch, please refer to the official product warranty document. This document outlines the terms and conditions of your warranty coverage.
For further assistance or support, please visit the official Casio website or contact their customer service. Keep your purchase receipt as proof of purchase for any warranty claims.





