Casio Mid Sized G-Shock GMA-S2100-1AER Black Resin Strap Black Dial Women's WatchCore Features of the Casio G Shock: G Shock watches are water resistant up to and over 10 bars or 100 meters. The hands and the indices of the models are luminescent. Incredibly durable, the watch is shock resistant, vibration resistant and centrifugal force resistant. Model Specifications: GMA S2100 1AER The 42. 83 mm case of the watch is made of black resin. Its bezel is also black. A black resin strap secures the watch. The combination of digital