Casio G Shock Mens Analogue & Digital Rubber WatchGA B2100FC hdc 700 3a3vdf ・Attaching metal straps may damage Weight 64 g a ・Attaching metal straps may damage strap holes Input range: 00'05" to 99'55" (1 minute increments and 5 second increments) 9 mm Weight 52 g Case and bezel material Carbon Resin Band Resin Band Construction Shock Resistant Carbon Core Guard structure Water resistance 200 meter water resistance Time adjustment Bluetooth: Connects to a smartphone and automatically adjusts the time Power supply and battery life Tough Solar (Solar powered) Smartphone Link App Connectivity Features Smartphone Link feature Mobile link (Wireless linking using Bluetooth®) Apps CASIO WATCHES App connectivity feature Auto time adjustment Easy watch setting Approximately 300 world time cities Time & place Reminder Phone finder Exterior Glass Mineral Glass Compatible band size 145 to 215 mm Other Neobrite Watch Features World time World time 38 time zones (38 cities + coordinated universal time) index markings