Dimensions of the case: 51 x 47.1 x 11.3 mm; weight: 145 g Material of the case and bezel Band made of stainless steel Band Made of Stainless Steel Three-fold one-touch clasp Resistance to water Water resistance of 100 meters Battery life and power source The SR920SW's battery lasts about three years. Features of the Watch One-second stopwatch Capacity measurement: