Automatic movement with a 40-hour power reserve.Seiko Caliber 4R36 Scratch resistant Hardlex crystal. Case size: 44 mm. Case thickness: 13 mm. Round case shape. Band width: 22 mm. Fold over clasp with safety release. Water resistant at 100 meters / 330 feet. Functions: date, day, hour, minute, second. Casual watch style. Seiko 5 Sports Automatic Black Dial Men's Watch SRP735.