GBX-100 Series Resin and stainless steel composition World time 1/100-second stopwatch 4 daily alarms with snooze 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 48.4 × W 45.9 × H 15.0 mm Weight: 58 grams   Style: gbx100-2a Material: Resin / Stainless Steel