2100 Series Carbon and resin composition Analog-digital dial Adjustable resin band with belt loop Mineral glass Shock resistant 200-meter water resistance Carbon core guard structure Smartphone link feature App connectivity Approx battery life: 2 years on SR726W X 2 World time zones Stopwatch, timer, alarm, and hourly time signal Calendar Mute feature Size: H 1.81 x W 1.67 x D 0.54 in Weight: 51 grams