2100 Series Resin and carbon composition Analog-digital dial Adjustable resin band with loop Mineral glass Shock resistant 200-meter water resistance Carbon core guard structure Approx battery life: 3 years on SR726W X 2 World time zones Stopwatch, timer, alarm, and hourly time signal Calendar Mute feature Size: H 0.46 x W 1.78 x L 1.90 in Weight: 51 grams