New R6 Smart heart monitoring ring

Product information: Color: Black (8 size), Black (9 size), Black (10 size), Black (11 size), Gold (8 size), Gold (9 size), gold (10 sizes), Gold (11 sizes) Applicable people: general Battery capacity: 17mAh Additional functions: steps, sleep monitoring, heart rate tracking, exercise data recording, health monitoring, blood oxygen measurement Waterproof grade: 5ATM Charging time: about 1 hour Life (time): 5-7 days of use, 15 days of standby Ring size inner diameter (mm): no.7 mm, no.8 mm, no.9 19.2, no.10 20mm, no.11 mm, no.12 21.6mm Wearing method: Ring Application: QRing Compatible Systems: Android5.1 (inclusive) and above, IOS8.0 (inclusive) and above FLASH memory: RAM208KB FLASH 512KB BT: 5.0 Bluetooth LE compatible chip Acceleration Sensor: Silicon Creation STK8321 Heart rate: Vcare VC30F Battery Type: polymer lithium ion Capacity: 15 mA hours Charging Method: magnetic charging APP software features: QRing: steps, sleep