SR08 SIZE 9 Smart Ring, Support Hand Gestures Control Health Monitoring Multiple Sports Modes About Product: 1. Material: Stainless steel 2. Display: LED digital display 3. Chip: DA-14585 4. Heart rate sensor: 3918 5. Storage capacity: 128kb ROM + 96 Kb RAM 6. Operating temperature: -20 degrees Celsius to 60 degrees Celsius 7. Charging method: Magnetic charging 8. Compatibility: Compatible with Android 5.0 and above; Compatible with Apple I0S10.0 and above 9. Compatible software: JRing 10. Waterproof: IP68 11. Battery Capacity:16 mAh 12. Theory Standby time:16-20 days 13. Normal using time:3-4 days 14. Size 9: Dia 19mm; Circumference 59.6mm Function: 1. Multiple movement modes:supports mountaineering, cycling, running and other sports modes 2. Heart rate,sleep,blood oxygen monitoring,time,steps 3. Hand gestures brush tiktok,wave your hand to take a picture immediately,Wechat&Apple Packing list: Smart Ring x 1 USB charging cable x 1