TechnoMarine Men's P1RG02-01 RoyalMarine P1 Automatic Gold-tone Black Rubber Watch Quality Swiss automatic movement; functions without a battery; powers automatically with the movement of your arm Swiss automatic ETA caliber 2836-2, self-wind movement Scratch resistant sapphire anti-reflective crystal Titanium and PVD unidirectional rotating bezel Water resistant to 660 feet (200 M): suitable for recreational scuba diving