Blood Pressure Smart Ring Health Tracker for Men Women Blood Oxygen, Sleep, Heart Rate, Pedometer, Body Temperature Waterproof Wireless Charge Compartment Compatible with iOS and Android APP Product Type: Health Smart Ring Color: Gunmetal, Silver, Black Material: Double-layer aviation alloy Application support: Android 5.0 or above, IOS 9.0 or above Temperature sensor: NST112C Bluetooth: BLE5.0 Heart rate sensor:HX3605 Gravity sensor: MSA310 Waterproof level: IP68 Standby time: 3~5 days Charging method: wireless charging (wireless charging base with built-in battery compartment) Packaging accessories: smart ring + standard charging cable + instruction manual Note: 1.Due to manual measurements, please allow slight measurement deviations. 2. Due to the different display and lighting effects, the actual color of the item may be slightly different from the color displayed on the picture. Thank you for your understanding. About After-sale Service： If you encounter any problems when buying and using our products, please contact us in time, we will serve you 24 hours.