Casio - G-Shock -G-Rescue - All Black - GW-7900B-1CR - With the never ending pursuit of toughness and technology, G-Shock introduces a Solar Atomic addition to the tough and rugged G-Rescue series. 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 - Moon Data (moon age of the specific data, moon phase graph) - Tide Graph (tide level for specific date and time) - 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, Countdown Timer, Measuring unit: 1 second, Input range: 1 minute to 24 hours (1-minute increments and 1-hour increments), 1/100 second stopwatch, Measuring capacity: 23:59'59.99", Measuring modes: Elapsed time, split time, 1st-2nd place times - Battery power indicator - Power saving function - Button operation tone on/off - Auto Calendar (pre-programmed until the year 2099) - 12/24 Hour Formats - Accuracy: +/- 15 seconds per month - Storage battery: Solar rechargeable battery - Approx. battery life: 9 months on full charge (without further exposure to light) - Size of case/total weight: GW7900B 52.4 x 50.0 x 17.7mm / 71g