The men's casio g-shock mudmaster was created especially for those whose work takes them into rough and dirty areas. Black dial, luminous hands and markers, digital display, double led light 58. 7 x 52. 1mm black resin case with sapphire crystal the carbon fiber core guard structure, resin case material, and metal button create a tough-wear mud and shock-resistant design triple sensor capabilities provide instant access to direction, barometric pressure, and temperature with bluetoothâ® technology, this style links to your smartphone for more features japanese quartz and digital movement; tough solar power recharges the battery black resin strap; buckle clasp water resistant to 200 meters we are an authorized casio dealer