The shock-resistant structure protects modules with a carbon fiber reinforced resin case; Highly airtight carbon case and filter protect against intrusion of mud (dust and mud resistant); 200-meter water resistance; Dual layered case back; Carbon fiber inserted bezel - a triple layered structure with a carbon fiber sheet inserted between fine resin; Super Illuminator (high brightness LED); Quad sensor - Thermometer, Barometer and Altimeter, Digital Compass, Step Counter; Lets you know the barometric pressure and altitude, temperature, and your direction