Tommy Hilfiger Men&#39;s 1710183 Black Leather Strap Watch Quality automatic movement; functions without a battery; powers automatically with the movement of your arm Watch does not require battery to operate, watch powered by the movement of your arm Much like the pendulum on a grandfather clock, a counterweight inside an automatic watch winds its gears with the motion of a wearers daily activity Stainless steel case; silver dial; black leather strap Water resistant to 99 feet (30 M): withstands rain and splashes of water, but not showering or submersion