G-Shock Watch G-Squad Heart Rate Monitor GBD-H1000-4. The GBD H1000 is packed with five sensor functions. In addition to 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 traveled, the new watch comes with GPS functionality that acquires location information. By analyzing the measured data, the watch can display an indicator of cardiorespiratory capacity. By connecting the watch with a dedicated app on a smartphone, the user can manage measurement data history such as calories burned and logged travel. The exterior delivers a good fit and practicality and features a high definition, memory in pixel LCD with high contrast, a bezel configuration that is easy to operate even without looking at the buttons, large non slip buttons, a curved back cover that carefully considers the back of the hand, and a soft urethane band. In addition to USB charging, the watch offers solar charging for daily use such as the vibrating notification function. This G SHOCK is optimal for everyday health monitoring and training.