Smart Ring Health Rings Waterproof Heart Rate Monitor Calorie Counter Pedometer

Functions:- Pedometer:StepsCaloriesDistance- Heart Rate Monitor- Sport Modes- Sleep Tracker- Remote Photography- Long Battery LifeHardware:Bluetooth:5.1Charging Type:Magnetic ChargingFull Charge Time:About 30-60 MinutesRing Battery:18mAhAPP:ECTRIStandby Time:One full charge gives you(5-7 days of working time)iOS 11.0 or aboveAndroid 6.0 or aboveRing Material:Stainless SteelPackaging Accessories:Smart Ring*1Charging Line*1Manual*1Charing Cable*1Ring Size:US8 (Ring inner diameter:18.1mm/0.71"Ring circumference:56.9mm/2.24")US9 (Ring inner diameter:18.9mm/0.74"Ring circumference:59.5mm/2.34")US10 (Ring inner diameter:19.8mm/0.78"Ring circumference:62.1mm/2.44")US11 (Ring inner diameter:20.6mm/0.81"Ring circumference:64.6mm/2.54")Weight:4.5g- IP68 Waterproof- DO NOT suitable for hot water bathingdivingswimmingwater-related work.