Casio Tactical G Rescue Tough Solar Watch / Tide Black small. This sleek Watch from Casio Tactical offers large buttons and an easy-to-use display format that is ideal for no-nonsense watch wearers. The Casio G Rescue Tough Solar / Tide Timepiece offers both moon data and tide graphs for its technologically inclined wearers. For the best way to stay in touch with nature and always be on time wear the Casio Tactical G Rescue Tough Solar and Tide Wrist Watch. Specifications for Casio Tactical G Rescue Tough Solar Watch / Tide: Atomic Timekeeping Signal: US WWVB UK MSF Germany DCF77 Japan JJY40/JJY60 China BPC Frequency: US 60kHz UK 60kHz Germany 77.5kHz Japan 40/60kHz China BPC 68.5kHz Stopwatch measuring capacity: 99 Stopwatch measuring modes: Elapsed time lap time split time Countdown timer measuring unit: 1 second Countdown input range: 1 minute to 24 hour (1-minute increments and 1-hour increments) Accuracy: 15 seconds per month Approx. battery life: 9 months on full charge (without further exposure to light) Storage Battery: Solar Rechargeable Battery Module: 3200 Size of case: GW7900B 52.4 x 50.0 x 17.7mm Total weight: GW7900B 71g Features of Casio Tactical G Rescue Tough Solar Watch / Tide: 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 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 1/100 second stopwatch Countdown timer Full Auto Calendar (pre-programmed until the year 2099) 12/24 Hour Formats Battery Power Indicator Power Saving Function Button operation tone on/off Package Contents: Casio Tactical G Rescue Tough Solar Watch / Tide Casio Tactical GW7900B-1: G Rescue Tough Solar Watch / Tide Black small