G-SHOCK The Rescue Concept 7900 Watch in White. From G-Shock, the watch that delivers unmatched toughness, comes a collection of new models that deliver a new level of protection. These watches are designed and engineered for rough and rugged activities. White resin band digital watch with neutral face. Shock Resistant 200M Water Resistant Low Temperature Resistant LCD (-20 C / -4 F) Auto EL Backlight with Afterglow Flash Alert (flashes with buzzer that sounds for alarms, hourly time signal, countdown timer time-up alarm, countdown timer progress beeper and stopwatch auto-start) Tide Graph (tide level for specific date and time) Moon Data (moon age of the input data, moon phase graph) World Time 29 times zones (48 cities), city code display, daylight saving on/off 4 Multi-function Alarms and 1 Snooze Alarm Hourly Time Signal Countdown Timer Measuring unit: 1 second Countdown range: 24 hours 1/100 second stopwatch Measuring modes: Elapsed time, split time, 1st-2nd place times Button Operation Tone on/off Auto Calendar (pre-programmed until the year 2099) 12/24 Hour Formats Accuracy: +/- 15 seconds per month Battery: CR2025 Approx. battery life: 2 years By G-SHOCK.