MULTIFUNCTIONS: - Time Display - Gestures : Brush TikTok - Pedometer:Steps,Calories,Distance - Heart Rate Monitor - Exercise Monitor - Remote Camera - Searching for Rings - Female Cycle Function - Sleep Tracker HARDWARE: Bluetooth:5.2 Full Charge Time:About 1 Hour Ring Battery:15mAh APP:QRing Standby Time:One full charge gives you(3-5 days of working time) iOS 11.0 or above,Android 9.0 or above Ring Material:Stainless Steel Packaging Accessories: Smart Ring*1 Manual Wireless Charing Line*1 RING SIZE: #8 (Ring inner diameter:18.3mm/0.72",Ring circumference:57.5mm/2.26") #9 (Ring inner diameter:19.1m/0.75",Ring circumference:60mm/2.36") #10 (Ring inner diameter:20m/0.79",Ring circumference:62.8mm/2.47") #11 (Ring inner diameter:20.8m/0.82",Ring circumference:65.4mm/2.57") #12 (Ring inner diameter:21.6m/0.85",Ring circumference:67.9mm/2.67") #13 (Ring inner diameter:22.3m/0.88",Ring circumference:70mm/2.76") - 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.