GMW-B5000 Series Stainless steel composition World time 1/100-second stopwatch 4 daily alarms Hourly time signal Button operation tone on/off 12/24-hour format Mineral glass Resin band Shock resistant 200-meter water resistance Battery life: 2 years approx on CR2032 Smartphone link feature through Bluetooth and Apps Phone finder Dial size: L 1.94 × W 1.70 × H 0.51 in Weight: 167 grams