G-Shock GMA-S140MC-1A - Watch CASIO - Free user manual and instructions
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| Product Type | Analog-Digital Watch |
| Brand | Casio |
| Model | G-Shock GMA-S140MC-1A |
| Series | G-Shock |
| Case Material | Resin |
| Case Size (approx.) | 46.0 mm |
| Case Thickness (approx.) | 13.8 mm |
| Weight (approx.) | 50 g |
| Band Material | Resin |
| Water Resistance | 200 meters (20 bar) |
| Shock Resistance | Yes |
| Display | LED backlight, analog and digital |
| Power Source | CR2016 battery (approx. 3 years life) |
| Accuracy | ±15 seconds per month |
| Stopwatch | 1/100 sec, 24 hours capacity |
| Timer | Countdown timer (up to 24 hours) |
| Alarms | 5 daily alarms (4 one-time, 1 snooze) |
| World Time | 31 time zones (48 cities + UTC) |
| Calendar | Full auto-calendar to year 2099 |
| Additional Functions | Hand shift, button operation tone on/off |
| Cleaning | Wipe with soft dry cloth; avoid solvents |
| Spare Parts & Repairability | Battery replacement by professional; genuine parts available via Casio service |
| General Information | Auto LED light with afterglow; instructions in English |
Frequently Asked Questions - G-Shock GMA-S140MC-1A CASIO
How do I set the time on my G-Shock GMA-S140MC-1A?
Press the Mode button until the time display starts flashing. Use the Adjust button to select the element (e.g., hour, minute), then press the Start/Stop button to change the value. Finally, press the Mode button to exit setting mode.
Is this watch suitable for swimming?
Yes, it is water-resistant to 200 meters, so it is suitable for swimming, snorkeling, and light diving (no scuba). Ensure the crown and buttons are not operated underwater.
How long does the battery last?
The CR2016 battery typically lasts about 3 years under normal use. The battery indicator shows when replacement is needed.
How do I use the stopwatch?
Press the Mode button to enter stopwatch mode. Press Start/Stop to start and stop timing, and press Reset to clear the measurement.
How do I set the alarm?
Press Mode to select alarm mode. Press Adjust to enter setting mode, use Start/Stop to change hour/minute, then press Adjust to confirm. To enable/disable the alarm, press the Mode button in alarm mode.
What does the 'LED' light function do?
The LED light illuminates the display for about 1.5 seconds. It also has an auto-light function that activates when you tilt the watch towards you (in certain modes).
How do I replace the battery?
Battery replacement should be done by a professional to maintain water resistance. Open the case back, remove the old CR2016, insert a new one with the positive side up, and close the back with proper gasket sealing.
Can I use the watch in extreme temperatures?
The watch operates normally between -10°C and 60°C (14°F to 140°F). Avoid prolonged exposure to extreme temperatures to prevent damage.
What is the 'hand shift' function?
The hand shift function temporarily moves the analog hands away from the digital display when you are using digital modes, ensuring clear visibility. It can be enabled/disabled in settings.
How do I adjust the world time?
Press Mode to select world time mode. Press Adjust to toggle DST settings, and use Start/Stop to scroll through time zones. Hold Adjust to swap the home and world time cities.
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