Case / bezel material: Stainless steel Resin Band Mineral Glass Screw Lock Back 100-meter water resistance Regular timekeeping Analog: 3 hands (hour, minute, second), 3 dials (date, day, 24-hour) Accuracy: 20 seconds per month Approx. battery life: 2 years on SR621SW Size of case: 53.5 x 40 x 10.6 mm Total weight: 72 g