Casio G-Shock GA2100VB-1A Virtual Carbon Core Guard WatchThe analog digital GA2100VB 1A takes a dive into the world of virtual reality. The basic black coloring of the watch is accented by blue violet, which creates a futuristic atmosphere of virtual reality for the GA2100 with octagonal bezel. Case size (L W H) 48. 5 45. 4 11. 8 mm Weight 51 g Case and bezel material Carbon Resin Resin Band Shock Resistant Carbon Core Guard structure 200 meter water resistance Approx. battery life: 3 years on SR726W X 2