These additions to the G-SHOCK MOVE lineup of sports watches are equipped with heart rate monitor and GPS. Useful workout functions include an optical sensor for heart rate measurement — along with bearing, altitude/barometric pressure, and temperature sensors — as well as an accelerometer for step counting. These five sensors help keep you in close touch of your current activity in real time. The ability to receive GPS signals lets you access location information when you need it. The surface form of the back covers of these models reduces interference with the back of the hand, while a soft urethane band provides a better fit to the wrist. Bi-color molded buttons are designed for ease of use, while a high-definition MIP LCD makes display information more legible. Both USB and solar charging are supported. The strap secures with a buckle clasp.