Casio Tactical G-Shock Black Tactical Watch - Shock Resistant. For added visibility in dark conditions a newly designed high-density LED light has been added to the Casio Tactical G-Shock Wrist Watch to light up the dial face from behind. The result is a super luminous display that's a true reflection of the Casio Tactical G-Shock Watch's desire to keep improving timekeeping. Specifications for Casio Tactical G-Shock Tactical Watch - Shock Resistant: Manufacturer: Casio Tactical Gender: Unisex Dial Color: Black Band/Strap Color: Black Case Color: Black Case Material: Resin Case Diameter: 55 mm Band/Strap Material: Resin Wrist Band Type: Strap Age Group: Adults Features of Casio Tactical Wrist Watch - G-Shock: 200M Water Resistant Shock Resistant Auto LED Backlight (Super Illuminator) Multi-time (4 different cities) World Time 31 time zones (48 cities + UTC) city code display daylight saving on/off 5 Independent Alarms (one-time or daily) Hourly Time Signal Flash alert Flasher with buzzer that sounds for alarms hourly time signal countdown timer time-up alarm countdown timer progress beeper 1/100 second stopwatch Measuring capacity: 23:59'59.99" Measuring modes: Elapsed time split time 1st-2nd place times Countdown timer Measuring unit: 1/10 second Countdown range: 24 hours Countdown start time setting range: 1 minute to 24 hours (1-second increments 1-minute increments and 1-hour increments) Other: progress beeper Full Auto Calendar (pre-programmed until the year 2099) 12/24 Hour Formats Button operation tone on/off Accuracy: +/-15 seconds per month Battery: CR2025 Approx. battery life: 7 years Package Contents: Casio Tactical G-Shock Tactical Watch Casio Tactical GD100-1B: G-Shock Black Tactical Watch - Shock Resistant