FENGFAUU Smart Ring Health Tracker - 24/7 Heart Rate Blood Oxygen Sleep Tracking

Smart Ring Health Tracker, Health Ring Smart Rings with 24/7 Heart Rate, Blood Oxygen and Sleep Tracker, IP68 Waterproof Fitness Activity Tracker Ring for Women and MenBasic Parameters✔Appearance Material: Stainless Steel.✔Band Size Diameter (mm): n 8 18.1mm, N 9 0.7 44 in, N 10 19.8 mm, n 11 20.6 mm. Weight: 4.4 g. Colour: black, rose gold. Waterproof rate: IP68. Charging time: approx. 1 hour. Battery life: 5 to 7 days of use, 15 days standby. Main functions: step, distance, calorie calculation, heart rate, oxygen saturation of the blood, blood pressure Sleep tracker. APP compatible system: Android 5.1 or higher, IOS8.0 or higher. Bluetooth: BT5.0 low-power Bluetooth chip. Battery capacity: 17 mAh. Charging method: magnetic charging. APP software functions: step, sleep, heart rate, record exercise data, health monitoring, blood pressure measurement, oxygen measurement in the blood, several Exercise modes, taking photos. Package list: 1 x smart ring + 1 x manual + 1 x packaging box + 1 x charging cable. Note: 1. Please remove the ring and clean it after bathing to avoid skin damage caused by residues of toiletries inside the ring.2. Please clean the charging interface regularly to avoid being unable to charge because of dirt.