G-Shock GA-140GB-1A2ER - Watch CASIO - Free user manual and instructions
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| Product Type | Watch |
| Brand | Casio |
| Model | G-Shock GA-140GB-1A2ER |
| Dimensions (H x W x D) | Approx. 53.4 x 49.1 x 16.1 mm |
| Weight | Approx. 69 g |
| Power Source | CR1220 battery, approximate battery life 2 years |
| Water Resistance | 200 meters (20 bar) |
| Shock Resistance | Yes |
| Display Type | Analog-Digital |
| Stopwatch | 1/1000 second stopwatch; measuring capacity: 99:59'59.999" |
| Countdown Timer | Measuring unit: 1 second; countdown range: 24 hours |
| World Time | 31 time zones (48 cities + coordinated universal time), daylight saving on/off |
| Alarm | 5 daily alarms (with 1 snooze alarm) |
| Light | LED light (Super Illuminator), selectable illumination duration (1.5 or 3 seconds) |
| Calendar | Full auto-calendar (to year 2099) |
| Precision | ±15 seconds per month |
| Case / Bez el Material | Resin / Chrome-plated |
| Band Material | Resin |
| Crystal | Mineral Glass |
| Maintenance & Cleaning | Wipe with a soft, damp cloth. Avoid solvents. |
| Safety | Do not operate buttons underwater. Rinse with fresh water after saltwater exposure. |
| Spare Parts & Repairability | Battery and strap replaceable. See authorized service centers. |
| General Information | Quartz movement, analog and digital display. Features include hand shift function, button operation tone on/off. |
Frequently Asked Questions - G-Shock GA-140GB-1A2ER CASIO
How do I set the time on my Casio G-Shock GA-140GB-1A2ER?
To set the time, press the adjust button (usually top left) to enter setting mode. Use the mode button to select the field you want to change (hour, minute, etc.), then use the forward button (top right) or back button (bottom right) to adjust. Press the adjust button again to exit.
How do I change the battery?
Open the back cover using a screwdriver. Replace the old CR1220 battery with a new one, ensuring correct polarity (+/-). Close the cover and press any button to restart. For water resistance, ensure the gasket is properly seated.
Is the GA-140GB water resistant?
Yes, it is water resistant to 200 meters (20 bar). Suitable for swimming, snorkeling, and water sports, but not for scuba diving. Do not operate the pushers underwater.
How do I use the stopwatch?
Press the mode button until the stopwatch appears. Press the start button (top right) to start/stop, and the reset button (bottom right) to reset. The stopwatch measures up to 99:59'59.999 with 1/1000th second precision.
How do I set the alarm?
In the alarm mode, press the adjust button to set the alarm time. Use the forward/back buttons to change hour and minute. Press adjust again to enable/disable the alarm. There are 5 daily alarms and a snooze alarm.
What is the model number of my watch?
The model number is G-Shock GA-140GB-1A2ER. It is printed on the case back or on the warranty card.
How do I adjust the date?
Date adjustment is done in timekeeping mode. Press the adjust button to enter setting, then press the mode button repeatedly until the date field is selected. Use forward/back buttons to set the date. The calendar is pre-programmed until 2099.
How do I turn on the light?
Press the light button (usually bottom left) to activate the LED Super Illuminator. The light stays on for 1.5 or 3 seconds, depending on your setting (adjustable in the hold for light setting).
How do I replace the strap?
Use a spring bar tool to remove the spring bars from the lugs. Attach the new strap by inserting the spring bar into the strap and then snapping it into the lugs. Ensure the spring bar is seated properly.
Is the GA-140GB solar powered?
No, the GA-140GB uses a standard CR1220 battery, not solar power. Battery life is approximately 2 years under normal use.
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