R02 Smart Ring Sleep Monitor Bluetooth5.0 Blood Oxygen Tracker Fitness Tracker Ring IP68 & 5ATM Waterproof Multi-sport Modes

Specification: Origin: Mainland China. Color: Black, Rose Gold Optional). Main Functions: Step Count, Distance, Calorie Count, Heart Rate, Blood Oxygen Saturation, Pressure, Sleep Tracking, Multi-Exercise Mode. Chip Manufacturer: for Lianrui Micro. Chip: RF03. App: Qring. Compatible Systems: for Android5.1 or Above, for IOS8.0 or Above. Flash Memory: Ram 208kb Rom 512kb. Bt: 5.0 Bluetooth-Compatible Low Power Chip. Acceleration Sensor: for Siltron STK8321. Heart Rate: Vcare VC30f. Battery Type: Polymer Lithium Ion. Capacity: 17mah. Charging Mode: Magnetic Charging. Waterproof Rating: 5ATM. Charging Time: About 1 Hour. Battery Life: 5-7 Days, Standby For 15 Days. Appearance Material: Stainless Steel. Size Diameter mm: No. 8 18.1mm/0.71in, No. 9 18.9mm/0.74in, No. 1019.8mm/0.77in, No. 1120.6mm/0.80in Optional). Weight: 4.4g. Packing Size: 757543mm/2.932.931.68in. Gross Weight: 70g. Note: Please purchase according to the size of the bracelet!. Please remove the ring after bathing and