Invicta Women's 4740 Pro Diver Collection Automatic Watch Quality Japanese Automatic movement; Functions without a battery; Powers automatically with the movement of your arm Scratch-resistant sapphire crystal Case diameter: 34mm Stainless-steel case; White-Mother-of-Pearl dial; Date function with magnifier; Unidirectional, 18k-gold-ionic0plated berzel Water resistant to 660 feet (200 M): suitable for recreational scuba diving