The case weighs 172 g and measures 51 × 48.4 × 12.1 mm (L × W × H). 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-tenth-second stopwatch Capacitor measurement