Basic InformationCase size (L W H)50.5 41.5 8.8 mmWeight105 gCase and bezel materialStainless steelBandStainless Steel BandOne-touch 3-fold ClaspWater resistance50-meter water resistancePower supply and battery lifeApprox. battery life: 3 years on SR621SWExteriorGlassMineral GlassCompatible band size150 to 205 mmWatch FeaturesAccuracyAccuracy: 20 seconds per monthOther featuresRegular timekeeping: Analog: 3 hands (hour, minute, second), 2 dials (date, day)