Tissot Men's T08159352 T-Win Collection Two-Faced Expansion Bracelet Watch Quality Automatic movement; Functions without a battery; Powers automatically with the movement of your arm Scratch-resistant-sapphire crystal Case diameter: 33 mm Stainless-steel case; Black dial; Date function Water resistant to 99 feet (30 M): withstands rain and splashes of water, but not showering or submersion