1. Introduction
This manual provides detailed instructions for the proper use and maintenance of your Casio G-Shock G-5600UE-1 digital watch. Designed for durability and functionality, this timepiece features shock resistance, 200-meter water resistance, and Tough Solar power. Please read this manual thoroughly to ensure optimal performance and longevity of your watch.
2. Product Overview
2.1 Key Features
- Shock Resistant (G-SHOCK construction)
- 200-Meter Water Resistance
- Tough Solar Power (solar charging system)
- LED Backlight with Afterglow
- World Time (supports multiple time zones)
- 1/100-Second Stopwatch
- Countdown Timer
- Multi-function Alarms and Hourly Time Signal
- Full Auto Calendar (pre-programmed until 2099)
- 12/24-Hour Format
- Flash Alert (flashes with buzzer for alarms, hourly time signal, countdown timer time-up alarm)
2.2 Watch Components
The Casio G-Shock G-5600UE-1 features a standard four-button configuration for navigation and function control.

Figure 1: Front view of the Casio G-Shock G-5600UE-1 digital watch. The display shows time, date, and day. Buttons are located on the left (MODE, ADJUST) and right (START/STOP, LIGHT) sides of the case.
- ADJUST Button (Top Left): Used to enter and exit setting modes, and to confirm settings.
- MODE Button (Bottom Left): Used to cycle through the watch's various modes (Timekeeping, World Time, Alarm, Stopwatch, Countdown Timer).
- LIGHT Button (Top Right): Activates the LED backlight. Also used to increase values during setting.
- START/STOP Button (Bottom Right): Used to start/stop stopwatch and countdown timer operations. Also used to decrease values during setting.
3. Setup
3.1 Initial Charging (Tough Solar)
Your watch is equipped with Tough Solar technology, which converts light into power. Before initial use, or if the watch display is blank, expose the watch face to bright light (e.g., sunlight or a bright window) for several hours to ensure it is sufficiently charged. Avoid prolonged exposure to extreme heat.
3.2 Setting the Home City and Time
- In the Timekeeping Mode, hold down the ADJUST button until the city code starts to flash. This indicates the setting mode.
- Use the LIGHT and START/STOP buttons to select your desired Home City code.
- Press the MODE button to cycle through other settings: DST (Daylight Saving Time), 12/24-hour format, Seconds, Hour, Minute, Year, Month, Day.
- For each setting, use the LIGHT and START/STOP buttons to adjust the value.
- Once all settings are configured, press the ADJUST button to exit the setting mode.
4. Operating Instructions
4.1 Mode Navigation
Press the MODE button to cycle through the watch's modes in the following order:Timekeeping Mode → World Time Mode → Alarm Mode → Stopwatch Mode → Countdown Timer Mode → Timekeeping Mode.
4.2 World Time Mode
In World Time Mode, you can view the current time in 48 cities (29 time zones) around the world.
- Press the START/STOP button to scroll through city codes.
- To toggle Daylight Saving Time (DST) for the currently displayed city, hold down the ADJUST button for approximately two seconds.
4.3 Alarm Mode
The watch has multiple alarms and an hourly time signal.
- In Alarm Mode, use the START/STOP button to select the desired alarm (AL1, AL2, AL3, AL4, AL5, SNZ for Snooze Alarm, or SIG for Hourly Time Signal).
- Hold down the ADJUST button until the alarm time starts to flash.
- Use the LIGHT and START/STOP buttons to set the hour and minute.
- Press the ADJUST button to exit the setting mode.
- Press the START/STOP button to toggle the alarm or hourly time signal ON/OFF.
4.4 Stopwatch Mode
The stopwatch measures elapsed time, split times, and two finishes.
- In Stopwatch Mode, press the START/STOP button to start and stop the measurement.
- Press the ADJUST button to reset the stopwatch to zero.
4.5 Countdown Timer Mode
The countdown timer can be set for a period of 1 minute to 24 hours.
- In Countdown Timer Mode, hold down the ADJUST button until the current countdown start time flashes.
- Use the LIGHT and START/STOP buttons to set the desired countdown start time.
- Press the ADJUST button to exit the setting mode.
- Press the START/STOP button to start and stop the countdown.
- When the countdown reaches zero, an alarm will sound. Press any button to stop the alarm.
4.6 LED Backlight
Press the LIGHT button to illuminate the display for easy viewing in low-light conditions. The backlight duration can typically be adjusted in the Timekeeping Mode settings.
5. Maintenance
5.1 Power Management (Tough Solar)
To ensure stable operation, expose the watch to light regularly. The watch has a power saving function that turns off the display when left in the dark for a certain period. The power indicator on the display shows the current charge level.
- Exposure to Light: Place the watch where it can receive direct sunlight or strong artificial light.
- Avoid Obstruction: Ensure the watch face is not covered by clothing or other objects.
- Charge Level: Monitor the charge indicator. If it drops to a low level, expose the watch to light immediately.
5.2 Water Resistance
Your G-Shock G-5600UE-1 is water resistant to 200 meters (20 BAR). This means it is suitable for showering, swimming, and diving (excluding saturation diving).
- Do not operate buttons while the watch is submerged in water or wet.
- After exposure to saltwater, rinse the watch with fresh water and wipe it dry with a soft cloth.
- Avoid exposing the watch to hot water or steam, as this can damage the seals.
5.3 Cleaning
Wipe the watch and band with a soft, dry cloth to remove dirt and moisture. For stubborn dirt, use a soft brush with mild soap and water, then rinse thoroughly and dry. Avoid using chemical cleaners or solvents.
6. Troubleshooting
- Display is blank or dim: The watch may be low on charge. Expose it to bright light for several hours. Ensure the power saving function is not active (if in a dark environment).
- Time is incorrect: Re-check your Home City setting and DST setting. Perform a manual time adjustment as described in Section 3.2.
- Buttons are unresponsive: Ensure the watch is not in a mode that locks button operations. If submerged or wet, dry the watch thoroughly before attempting to operate buttons.
- Water inside the watch: If you notice condensation or water droplets inside the watch, stop using it immediately and contact Casio service for inspection.
7. Specifications
| Model Number | G-5600UE-1 |
| Case Dimensions (L×W×H) | 48.9 × 42.8 × 13.4 mm |
| Weight | 52g |
| Case and Band Material | Resin |
| Crystal | Mineral Glass |
| Water Resistance | 200 Meters (20 BAR) |
| Power Source | Tough Solar (Solar Powered) |
| Battery Type | 1 Lithium Metal battery (included) |
| Approx. Battery Life (without solar charge) | 2 years on CR2016 (Note: Tough Solar power system significantly extends operational life with regular light exposure.) |
| Accuracy | ±15 seconds per month |
| Backlight | Electro-luminescent backlight with Afterglow |
| Special Features | Shock Resistant, World Time, 1/100-second Stopwatch, Countdown Timer, Multi-function Alarms, Hourly Time Signal, Full Auto Calendar, 12/24-hour format, Flash Alert |
8. Warranty and Support
Your Casio G-Shock G-5600UE-1 watch is covered by a manufacturer's warranty. For specific warranty terms, service, or technical support, please refer to the warranty card included with your purchase or visit the official Casio website.
Official Casio Support: https://www.casio.com/us/support/





