G-Shock - Wristwatch GW-7900B-1ER
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DESCRIPTION
FUNCTIONALITY & EXTRAS
MATERIAL & DIMENSIONS
PRODUCT SAFETY GPSR
- Solar Atomic technology: radio control and solar charging
- Robust design with long battery life
- Special features such as tide chart and moon phase display
With its tireless pursuit of durability and innovative technology, the G-SHOCK GW-7900B-1ER sets new standards. This watch is part of the G-Rescue series, renowned for extreme toughness and user-friendliness – perfect for outdoor enthusiasts and professionals. Thanks to the Solar Atomic system, it guarantees precise radio-controlled timekeeping and an environmentally friendly, solar-powered energy supply.
The housing and oversized buttons offer excellent operability, even when wearing gloves. Special features such as the tide graph and moon phase display make it the ideal companion for adventures at sea or along the coast. The fully automatic EL light ensures clear legibility even at night. With a battery life of up to 26 months in power-saving mode, it proves reliable under all conditions.
The world time function with 31 time zones, a precise countdown timer and five alarms make the GW-7900B-1ER an indispensable tool. The robust design is complemented by the monochrome IP color and the distinctive look of the G-Rescue series.
Water resistance
- Water-resistant up to 20 bar
Alarm/hourly time signal
- 5 daily alarms (including one snooze alarm)
- Hourly time signal
Battery display/warning
- Battery level indicator
Illumination
- Electroluminescent backlight Fully automatic EL light, afterglow
Power-saving function
- Power-saving function (display turns off to save power when the watch is in the dark)
Accuracy
- Accuracy: ±15 seconds per month (without signal calibration)
Tide graph
- Tide graph (tide level for a specific date and time)
Calendar
- Fully automatic calendar (up to 2099)
Operating time
Approximate battery operating time:
- 9 months on rechargeable battery (operation period with normal use without exposure to light after charge)
- 26 months on rechargeable battery (operation period in total darkness with power-saving function enabled after full charge)
Stopwatch
- 1/100-second stopwatch
- Measuring capacity: 23:59'59.99''
- Measuring modes: Elapsed time, split time, 1st-2nd place times
Mute function
- Button operation tone on/off
Timer
- Countdown timer Measuring unit: 1 second
- Input range: 1 minute to 24 hours (1-minute and 1-hour increments)
Other functions
- 12/24-hour format
- Regular timekeeping:
Hour, minute, second, 12-hour (pm), month, date, day
World time
- World time
- 31 time zones (48 cities + Coordinated Universal Time), city code display, daylight saving time on/off
Time setting details
- Time calibration signal
- Station name: DCF77 (Mainflingen, Germany)
Frequency: 77.5 kHz - Station name: MSF (Anthorn, England)
Frequency: 60.0 kHz - Station name: WWVB (Fort Collins, USA)
Frequency: 60.0 kHz - Station name: JJY (Fukushima, Fukuoka/Saga, Japan)
- Frequency: 40.0 kHz (Fukushima)/60.0 kHz (Fukuoka/Saga)
- Station name: BPC (Shangqiu City, Henan Province, China)
- Frequency: 68.5 kHz
- Time calibration signal reception
- Up to six automatic receptions per day (remaining automatic receptions are canceled as soon as one is successful)
* 5 times per day for the Chinese calibration signal - Manual reception
Last signal reception results
Casio-Platz 1
22848 Norderstedt
Germany
Email: info@casio.de
DESCRIPTION
- Solar Atomic technology: radio control and solar charging
- Robust design with long battery life
- Special features such as tide chart and moon phase display
With its tireless pursuit of durability and innovative technology, the G-SHOCK GW-7900B-1ER sets new standards. This watch is part of the G-Rescue series, renowned for extreme toughness and user-friendliness – perfect for outdoor enthusiasts and professionals. Thanks to the Solar Atomic system, it guarantees precise radio-controlled timekeeping and an environmentally friendly, solar-powered energy supply.
The housing and oversized buttons offer excellent operability, even when wearing gloves. Special features such as the tide graph and moon phase display make it the ideal companion for adventures at sea or along the coast. The fully automatic EL light ensures clear legibility even at night. With a battery life of up to 26 months in power-saving mode, it proves reliable under all conditions.
The world time function with 31 time zones, a precise countdown timer and five alarms make the GW-7900B-1ER an indispensable tool. The robust design is complemented by the monochrome IP color and the distinctive look of the G-Rescue series.
FUNCTIONALITY & EXTRAS
Water resistance
- Water-resistant up to 20 bar
Alarm/hourly time signal
- 5 daily alarms (including one snooze alarm)
- Hourly time signal
Battery display/warning
- Battery level indicator
Illumination
- Electroluminescent backlight Fully automatic EL light, afterglow
Power-saving function
- Power-saving function (display turns off to save power when the watch is in the dark)
Accuracy
- Accuracy: ±15 seconds per month (without signal calibration)
Tide graph
- Tide graph (tide level for a specific date and time)
Calendar
- Fully automatic calendar (up to 2099)
Operating time
Approximate battery operating time:
- 9 months on rechargeable battery (operation period with normal use without exposure to light after charge)
- 26 months on rechargeable battery (operation period in total darkness with power-saving function enabled after full charge)
Stopwatch
- 1/100-second stopwatch
- Measuring capacity: 23:59'59.99''
- Measuring modes: Elapsed time, split time, 1st-2nd place times
Mute function
- Button operation tone on/off
Timer
- Countdown timer Measuring unit: 1 second
- Input range: 1 minute to 24 hours (1-minute and 1-hour increments)
Other functions
- 12/24-hour format
- Regular timekeeping:
Hour, minute, second, 12-hour (pm), month, date, day
World time
- World time
- 31 time zones (48 cities + Coordinated Universal Time), city code display, daylight saving time on/off
Time setting details
- Time calibration signal
- Station name: DCF77 (Mainflingen, Germany)
Frequency: 77.5 kHz - Station name: MSF (Anthorn, England)
Frequency: 60.0 kHz - Station name: WWVB (Fort Collins, USA)
Frequency: 60.0 kHz - Station name: JJY (Fukushima, Fukuoka/Saga, Japan)
- Frequency: 40.0 kHz (Fukushima)/60.0 kHz (Fukuoka/Saga)
- Station name: BPC (Shangqiu City, Henan Province, China)
- Frequency: 68.5 kHz
- Time calibration signal reception
- Up to six automatic receptions per day (remaining automatic receptions are canceled as soon as one is successful)
* 5 times per day for the Chinese calibration signal - Manual reception
Last signal reception results
MATERIAL & DIMENSIONS
PRODUCT SAFETY GPSR
Casio-Platz 1
22848 Norderstedt
Germany
Email: info@casio.de
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Yes, you can return the item within 31 days of receipt if it does not fit or you do not like it – returns within Germany are even free of charge. You can find more information in our detailed FAQs or on the "Returns" page.
Many of our products come with a manufacturer’s warranty. You can find details in the product description or on the manufacturer’s website.
Our FAQs didn’t answer your question? Then feel free to contact us – we’re happy to help!
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