Casio G Shock Analog Digital Bio Based Resin Strap Blue Dial Quartz GA 2100AS 5A 200M Mens Watch COA:SIN Battery life: up to 8 SKW2151 Battery life: up to 8 days in smartwatch mode Brand Casio Collection G Shock G Squad Model Number GBD 300 1 GBD300 1 Gender Men's Movement Quartz Digital Display Type Digital LCD Case Shape Round Case Material Bio Based Resin Case Diameter Approximately 45mm Case Thickness Approximately 15mm Estimated Weight 52g Band Material Bio Based Resin Band Type Two Piece Strap Band Width Approximately 22mm Lug Width Approximately 22mm Lugs Count 4 Crown Type Push Button Caseback Type Screw in Water Resistance 200 Meters (20 ATM) Crystal Mineral Glass Connectivity Bluetooth Smartphone Link Special Features Shock Resistant Brand: Casio Description: Features: Carbon Case Bio Based Resin Strap Quartz Movement Mineral Crystal Blue Dial Analog Digital Display Shock Resistant Carbon Core Guard Structure Neobrite World Time 1 100 Second Stopwatch Countdown Timer 5 Daily Alarms Hourly Time Signal Double LED Light Full Auto Calendar Button Operation Tone On Off Hand Shift Feature 12 24 Hours Display Luminous Hands Month let us know