The G-Shock GWG-100-1A3 Master of G Mudmaster Triple Sensor is a rugged watch perfect for outdoor enthusiasts. It comes with a triple sensor that measures altitude, barometric pressure and temperature. It also comes with a compass, stopwatch and countdown timer. The watch is water resistant to 200 meters and has a solar powered movement. The watch shows signs of use, the lower left button is slow to spring back but does not affect use, see pictures.