SEIKO Solar Diver's 200M SNE107P2Solar powered generating system, meaning that there is no need to ever change batteries; 180 Days month power reserve when fully charged.Caliber: Seiko V158 Quartz Movement made in Japan.A window at the 3 o'clock hour reveals the automatic day calendar.Metal: Stainless Steel / 36 Unidirectional rotating bezel Size: 47mm with crown Band:Rubber StrapWater resistance to 200 meters/ 20 barsGlass: Hardlex crystalDial: BlackOne year International warranty