Product parameters Body material: zinc alloy plating Strap material: silicone Product size (cm): diameter 47.6MM, thickness 13MM Waterproof grade IP67 Wristband material: silicone material Color more→: black, silver, gold, Bluetooth antenna: support Motor: Support Bluetooth: V5.0 TFT 1.5 full circle full touch Side button 2 Screen Diagonal: 1.5" Waterproof Rating: IP67 Heart Rate: Yes Pedometer: Yes Calorie Counter: Yes Compatibility: Android 5.0 or IOS 10.0 Battery capacity 230mAh Basic functions: answer calls, make calls, heart rate/blood oxygen/blood pressure monitoring, calculator, time/calendar display, step counting, distance, calories, weather, Bluetooth music playback, sleep