Casio Tactical G-Shock Solar MultiBand Atomic Watch Black/Black. This Watch from Casio Tactical will ensure that you're always on time with its automatic Multi-Band Atomic Timekeeping capabilities and you are ready for anything thanks to its solar rechargeable battery. The shock and water resistant Casio Tactical G Shock Solar Atomic Wrist Watch will be safe in every terrain and is ideal for those who regularly test the elements. For a tough and rugged watch to meet all your needs look no further than the Casio Tactical G Shock Solar Atomic Timepiece. Specifications for Casio Tactical G Shock Solar Atomic Watch: 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 Others: Speed (0-1998 units/hour) Selection distance input (0.0-99.9) Countdown timer measuring unit: 1 second Countdown input range: 1 minute to 24 hours (1-minute increments and 1-hour increments) Accuracy: 15 seconds per month Approx. battery life: 10 months on full charge (without further exposure to light) Storage battery: Solar rechargeable battery Module: 3195 Size of case: GW2310 52.5 x 46.4 x 15.6mm / GW2310BD 52.5 x 46.4 x 15.6mm Total weight: GW2310 69g / GW2310BD 131g Features of Casio Tactical G Shock Solar Atomic Watch: 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 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 Button operation tone on/off Storage battery: Solar rechargeable battery Battery power indicator Power saving function Package Contents: Casio Tactical G Shock Solar Atomic Watch Casio Tactical GW2310FB-1: G-Shock Solar MultiBand Atomic Watch Black/Black