Casio G-Shock GA-2100-7AER Octagon Series White Carbon Core Guard Men's WatchCore Features of the Casio G Shock Carbon Core Octagon: G Shock watches are water resistant up to over 10 bars or 100 meters. The hands and the indices of the models are luminescent. This watch pays homage to the original model through its retro inspired octagonal bezel. Model Specifications: GA 2100 7AER The white case of the watch is made of carbon reinforced resin. A white resin strap secures the watch. The black dial gives the watch its high tech