G-Shock GMA-S140-8AER - Wristwatch CASIO - Free user manual and instructions
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| Product Type | Wristwatch |
| Brand | Casio |
| Model | G-Shock GMA-S140-8AER |
| Category | Watch |
| Case Material | Resin |
| Case Size | 44.5 mm |
| Case Thickness | 13.1 mm |
| Band Material | Resin |
| Weight | 42 g |
| Water Resistance | 200 m (20 bar) |
| Shock Resistance | Yes |
| Display Type | Analog-Digital |
| Power Source | CR2016 battery |
| Battery Life | Approx. 3 years |
| Main Functions | World time, stopwatch, countdown timer, alarms, calendar, LED light |
| Care and Cleaning | Wipe with a soft dry cloth; avoid solvents and detergents |
| Safety Warning | Not for saturation diving; keep away from small children |
| Spare Parts | Genuine straps and batteries at authorized service centers |
| Repairability | Battery and strap replacement easy; professional service for other issues |
Frequently Asked Questions - G-Shock GMA-S140-8AER CASIO
How do I set the time on my Casio G-Shock GMA-S140?
Press the Mode button to enter Timekeeping mode, then hold Adjust until the seconds flash. Use the Search and Light buttons to change values, and press Mode to move between fields. Press Adjust to finish.
Is the GMA-S140 suitable for swimming?
Yes, it has a 200-meter water resistance, making it suitable for swimming and snorkeling, but not for scuba diving.
How do I change the battery on this watch?
Use a small screwdriver to open the case back, carefully replace the CR2016 battery, and ensure the O-ring is seated properly to maintain water resistance. We recommend a professional service to avoid damage.
How do I use the stopwatch function?
Press Mode until you reach Stopwatch mode. Press Start to begin and stop, and Reset to zero. The stopwatch measures to 1/100 second.
How long does the battery last?
The battery typically lasts approximately 3 years under normal use, depending on the frequency of lighting and alarms.
Does it support world time?
Yes, the watch supports world time with 29 time zones, selectable by pressing the Search or Light buttons.
How can I adjust the band length?
The resin band has multiple adjustment holes. Simply move the buckle to the desired hole. For additional sizing, contact a service center.
How do I set an alarm?
In Alarm mode, hold Adjust until the hour flashes, then set the hour and minutes using the Search and Light buttons. Press Adjust to save.
What is the illumination system?
The watch features a Super Illuminator LED light for easy reading in the dark. Press the Light button to activate it.
Can I replace the battery myself?
Yes, if you have the right tools and experience, but take care to preserve the water seal. After replacement, test water resistance in a shallow bowl before submerging.
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USER MANUAL G-Shock GMA-S140-8AER CASIO
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Product information
Brand : CASIO
Model : G-Shock GMA-S140-8AER
Category : Wristwatch