Case: Ceramic 45 x 40 MM Movement: Sellita SW200 automatic mechanical movement Waterproof to 30 metres / 3 ATM -10/+15 sec/day precision Bidirectional self-winding via Perpetual rotor winding Approximately 38 hours power reserve Bracelet: Ceramic Detachable and adjustable Style: pea001c-blu Color: Blue Material: Ceramic