Rado Centrix Steel and Ceramic Automatic Mens Watch R30178152 Self-winding automatic movement - an Eco-friendly choice for discerning customer. Powered by everyday movement of your arm Automatic self-winding movement with analog display and sapphire crystal dial window Water-resistant Two tone ceramic stainless steel case with skeleton dial Water resistant to 3 ATM / 30 meters / 100 feet : withstands rain and splashes of water but not showering or submersion