100-meter water resistance, LED light, Resin Case and Resin Bezel, Resin Band, Resin Glass, Analog: 3 hands (hour, minute, second) Accuracy: 20 seconds per month, Approx. battery life: 3 years on SR626SW (Analog), 3 years on CR1616 (Light 9 [sec/day]) Quartz Movement Case Diameter: 35mm Water resistant to 100m (330ft): in general, suitable for swimming and snorkeling, but not diving