2100 Series Stainless steel composition Analog-digital dial Stainless steel band with clasp closure Mineral glass Shock resistant 200-meter water resistance Approx battery life: 3 years on SR726W X 2 World time zones Stopwatch, timer, alarm, and hourly time signal Calendar Mute feature Size: H 0.50 x W 1.75 x L 1.96 in Weight: 165 grams   Style: gmb2100gd-9a Material: Stainless steel