A long-standing benchmark in reliable, hard-working and resilient adventuring watches, the Casio Tactical Master of G Frogman GWF1000 features innovations that transcend the traditional role of a timepiece to provide a high-tech, multi-purpose tool suited for any climate and any terrain. This watch contains a unique time calibration radio signal receiver that ensures precise timekeeping and operates on a signal sensor, which receives signals up to six times a day. There is an abundance of unique features on the watch, such as a moon data recorder, stopwatch, countdown timer and dive time/surface interval measurement function. This watch is ideal for divers, pilots, military professionals or serious outdoorsmen because it is water-resistant to 200 meters and impact resistant. It is also solar powered and holds an eight-month charge with no exposure to sunlight.