G-Shock GA140-1A4 - Watch CASIO - Free user manual and instructions
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| Product Type | Digital/Analog Watch |
| Brand | Casio |
| Model | G-Shock GA140-1A4 |
| Display | Analog and digital dual display |
| Water Resistance | 200 meters (20 bar) |
| Shock Resistance | Yes (G-Shock certified) |
| Dimensions (Case) | Approx. 53.9 × 48.8 × 14.9 mm |
| Weight | Approx. 92 g |
| Battery Type | SR927W (approx. 2 years battery life) |
| Stopwatch | 1/1000 second, up to 100 hours |
| Timer | Countdown timer (up to 24 hours) |
| Alarm | 5 daily alarms + 1 snooze alarm |
| World Time | 31 time zones (48 cities + UTC) |
| Illumination | Super LED light |
| Calendar | Full auto-calendar (to year 2099) |
| Accuracy | ±15 seconds per month |
| Case Material | Resin |
| Band Material | Resin strap |
| Crystal | Mineral glass |
| Care Instructions | Wipe with a dry soft cloth; avoid solvents |
| Safety Precautions | Do not operate buttons underwater; replace battery promptly |
| Spare Parts / Repairability | Battery and strap available; contact Casio service centers |
| General Information | Manufactured by Casio Computer Co., Ltd., Japan |
Frequently Asked Questions - G-Shock GA140-1A4 CASIO
How do I set the time on my Casio G-Shock GA140-1A4?
In normal timekeeping mode, press the 'Adjust' button (usually top left) to enter setting. Use the buttons to change values. Refer to the user manual for detailed steps.
Is the GA140-1A4 water resistant?
Yes, it is water resistant to 200 meters (20 bar). Suitable for swimming and snorkeling, but not for scuba diving. Do not operate the buttons underwater.
How do I change the battery?
The battery is type SR927W. It is recommended to have the battery replaced by a professional using proper tools. Remove the back cover carefully, replace the battery, and ensure the seal is intact to maintain water resistance.
How do I use the stopwatch?
Press the 'Mode' button until you reach stopwatch mode. Press 'Start/Stop' to begin and stop timing. Press 'Split/Reset' to record laps or reset. The stopwatch measures up to 100 hours with 1/1000 second precision.
How do I set an alarm?
In alarm mode, press the 'Adjust' button to enter setting. Use the buttons to set the hour and minute. Press 'Mode' to activate or deactivate the alarm. The watch has 5 daily alarms and a snooze feature.
What is the world time feature?
The world time function displays the current time in 31 time zones (48 cities + UTC). Press the 'World Time' button to cycle through zones. You can swap the home time with the world time using the 'Swap' function.
How do I turn on the backlight?
Press the 'Light' button (usually top right) to activate the Super LED light. The light illuminates the display for a few seconds. You can set the light duration in the settings menu.
Why is my watch not starting?
If the watch is completely inactive, the battery may be dead. Replace with a fresh SR927W battery. If it still does not start, press the 'Reset' button (if available) or contact Casio service.
How do I clean my G-Shock?
Wipe the case and strap with a soft, dry cloth. For stubborn dirt, use a mild soap solution and rinse with fresh water. Avoid solvents, alcohol, and abrasives that may damage the resin.
Can I replace the strap?
Yes, the strap is replaceable. Use a spring bar tool to remove the old strap and attach a new one. Genuine Casio straps are available from authorized dealers. Ensure the new strap is compatible with the GA140 model.
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