G-Shock Classic GAW-100B-1A2ER - Watch CASIO - Free user manual and instructions
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| Product Type | Wristwatch |
| Brand | Casio |
| Model | G-Shock Classic GAW-100B-1A2ER |
| Category | Watch |
| Display Type | Analog-Digital |
| Dimensions (W x H x D) | Approx. 48.5 × 45.4 × 13.6 mm |
| Weight | Approx. 68 g |
| Case Material | Resin |
| Band Material | Resin |
| Water Resistance | 200 meters |
| Power Source | Tough Solar (solar rechargeable) |
| Battery Life | Approx. 11 months on full charge (without exposure to light) |
| Radio Controlled | Multi-Band 6 (receives time calibration signals from 6 stations) |
| World Time | 31 time zones (48 cities + UTC), daylight saving on/off |
| Stopwatch | 1/100 second – 24 hours |
| Timer | Countdown timer: 1 minute to 24 hours |
| Alarms | 5 daily alarms (with 1 snooze alarm) |
| Calendar | Auto-calendar with date, month, and day |
| Illumination | LED light (Super Illuminator), selectable afterglow |
| Accuracy | ±15 seconds per month (without radio calibration) |
| Other Features | Hand shift function, button operation tone on/off, low battery alert, full auto calendar |
| Maintenance | Clean with a soft cloth; avoid solvents; replace gaskets every few years |
| Safety Precautions | Do not press buttons underwater; avoid strong magnetic fields; keep away from infants |
| Spare Parts | Battery (CR1220) available; straps and bezel replaceable by authorized service |
| Repairability | Battery replacement and basic repairs by authorized Casio service centers |
Frequently Asked Questions - G-Shock Classic GAW-100B-1A2ER CASIO
How do I set the time on my Casio G-Shock GAW-100B-1A2ER?
Press the Adjust button (bottom-left) to enter timekeeping mode. Hold it for about 2 seconds until the seconds digits flash. Use the Forward and Reverse buttons to adjust the time. Press Adjust to move to next setting.
How does the solar charging work?
The watch uses a Tough Solar system. Place it under sunlight or bright indoor light to charge. Even fluorescent lamps can charge it. The power level indicator shows charge status.
Is this watch suitable for diving?
It has 200 meters water resistance, making it suitable for recreational scuba diving and snorkeling. Do not operate buttons underwater.
How do I use the world time function?
Press the Mode button until you reach world time mode. Use Forward and Reverse to scroll through cities. Press Adjust to toggle Daylight Saving Time.
Why is my watch not receiving the radio signal?
Place the watch near a window, preferably at night, with the dial facing upward. Avoid metal objects and electronic devices. In areas distant from stations, manual setting is required.
How do I change the battery?
The battery is a CR1220 type. We recommend having it replaced by an authorized Casio service center to maintain water resistance. The solar system recharges a secondary battery, which has a lifespan of about 11 months.
What does the 'hand shift' function do?
The hand shift function temporarily moves the analog hands away from the digital display when you press the Light button, making the digital readout easier to read.
How do I set the alarm?
In alarm mode, press Adjust to edit an alarm. Use Forward/Reverse to set hour and minute. Press Mode to exit. Ensure the alarm is enabled (shown by an alarm indicator).
Can I wear this watch while swimming?
Yes, it is 200m water resistant which is suitable for swimming and snorkeling. Avoid pressing buttons while submerged.
How do I reset the stopwatch?
In stopwatch mode, press the Start/Stop button to start/stop. Press Reset to return to zero.
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