- Multi-Band Atomic Timekeeping (US, UK, Germany, Japan, China
- Receives time calibration radio signals which keep the displayed time accurate
- Auto receive function (up to 6 times per day/up to 5 times per day for China)
- Manual receive function
- Signal: US WWVB, UK MSF, Germany DCF77, Japan JJY40/JJY60, China BPC
- Frequency: US 60kHz, UK 60kHz, Germany 77.5kHz, Japan 40/60kHz, BPC 68.5kHz
- Tough Solar Power
- Shock Resistant
- 200M Water Resistant
- Full Auto EL Backlight with Afterglow
- Tide Graph (tide level for specific date and time)
- Moon Data (moon age of the specific date and moon phase graph)
- World Time
- 31 times zones (48 cities + UTC), city code display, daylight saving on/off
- 4 Daily Alarms and 1 Snooze Alarm
- Hourly Time Signal
- 1/100 second stopwatch
- Measuring capacity: (23:59'59.99'')
- Measuring modes: Elapsed time, split time, 1st-2nd place times
- Countdown Timer
- Measuring unit: 1 second
- Input range: 1 minute to 24 hours (1-minute increments and 1-hour increments)
- Battery power indicator
- Power saving function
- Button operation tone on/off
- Full Auto Calendar (pre-programmed until the year 2099)
- 12/24 Hour Formats
- Accuracy: ± 15 seconds per month (with no signal calibration)
- Storage battery: Solar rechargeable battery
- Approx. battery life: 9 months on full charge (without further exposure to light)
- Module 3193
- Size of case/total weight
- GW7900 52.4 x 50.0 x 17.7mm / 71g
GW7900-1
The G-SHOCK G-Rescue series combine tough, high-performance digital timekeeping with radio-controlled accuracy. Large buttons are designed to allow operation while wearing thick gloves, for even those with protective clothing. Tide Graph and Moon Phase features show tide and moon information for preset areas. Other advanced features include highly shock-resistant construction, a Tough Solar power system, MULTIBAND 6 reception of six time calibration signals around the globe, and much more.