Casio G-Shock Gravitymaster Atomic GPS Hybrid Wave Ceptor GPW-1000-2AJF Men's WatchCasio G Shock Gravitymaster Atomic GPS Hybrid Wave Ceptor GPW 1000 2AJF Men's Watch You get the best of both worlds with the GPS and the radio connectivity; it can read, process and compare both types of signals, thus ensuring maximum possible level of accuracy. Its reliability and the high impact resistant construction makes it suitable for the harshest of environments; moreover, it stands up to three types of gravitational mayhems: Shocks,