Casio G-Shock GW-7900-1ER Radio Controlled Digital Chronograph Black Men's WatchCore Features of the Casio G Shock: G Shock watches are water resistant over 10 bars or 100 meters. The hands and the indices of the models are luminescent with Neobrite coating. Incredibly durable, the watch is shock resistant, vibration resistant and centrifugal force resistant. Casios G Shock can be paired with a smartphone. Model Specifications: GW 7900 1ER The black case of the watch is made of resin. A black resin strap secures the watch. The