cnBro Smart Ring - Time Display Heart Rate Monitor

MULTIFUNCTIONS: - Time Display - Pedometer:Steps,Calories,Distance - Heart Rate Monitor - Exercise Monitor - Remote Camera - Sleep Tracker HARDWARE: Bluetooth:5.0 Ring Battery:16mAh APP:KUMIWear Standby Time:One full charge gives you(3-5 days of working time) iOS 10.0 or above,Android 5.1 or above Ring Material:Zinc Alloy Packaging Accessories: Smart Ring*1 Manual Three Sizes of Stretchable Bands Charing Line*1 RING SIZE: Ring Diameter:27mm*19.5mm(1.06"-0.77") Ring Thickness:10.9mm (0.43") Three Sizes of Stretchable Bands - IP68 Waterproof - DO NOT suitable for hot water bathing,diving,swimming,water-related work. Any questions,please kindly contact us,we would always offer best solution to you.