Packed with five-sensor functions, the G-SHOCK GBD-H1000 is optimal for everyday health monitoring and training. Besides an optical sensor that can measure heart rate by detecting the blood flow under the skin, a triple sensor that measures altitude/barometric pressure, compass bearing and temperature and an acceleration sensor that measures step count and distance travelled, the GBD-H1000 comes with GPS functionality so you always know where you are and where you're headed. G-SHOCK also offers an exclusive app; by connecting the watch to your smartphone via bluetooth, you can manage measurement data history including calories burned, logged travel and much, much more. Shock-resistant construction Waterproof to 200m so suitable for diving 5 sensors including heart rate, compass, air pressure & altitude, temperature and step counter GPS Multiple training functions World time Stopwatch Countdown timer 4 daily alarms Solar-powered charging system