Features proprietary Eco-Drive technology. Powered by light, any light. Never needs a battery.; Stainless steel; sapphire crystal; Case size: 42mm; Foldover clasp closure; Water resistant to 10 ATM; Japanese solar quartz movement; Blue dial with date, day, month, and moonphase windows; Stainless steel link bracelet; Manufacturer's five-year limited warranty; Photo may have been enlarged and/or enhanced; Imported