Casio G-Shock Gravitymaster Atomic Triple G Resist GPW-1000-4A Men's WatchThe G-SHOCK GRAVITYMASTER line-up now introduces the GPW-1000 series built on Casio’s own GPS HYBRID WAVE CEPTOR*2 technology. Its Multiband-6 capability (receives from six time-calibration signal emitting transmitters around the world) determines a wearer’s current time zone and rechecks it with the GPS signals from overhead; it also determines whether you need any adjustments regarding DST and the likes. It also does the same for the World Time and its Dual-time features.