R18 SIZE 8 Smart Ring, Support Heart Rate / Blood Oxygen / Sleep / Multiple Sports Modes(Black)

About Product
1. Main Chip: Dialog DA14531-01
2. Bluetooth: 5.1
3. Sensor chip: SC7A20
4. Battery Capacity: 17.5mAh
5. Battery life: 8-10 days of use and 10-15 days of standby
6. Charging time: 2H
7. Waterproof: IP65
8. Size 8: Dia 18.2mm/0.72 inch
9. Charging method: Magnetic charging
10. Compatible system: Android5.0 or above, iOS10.0 or above
11. APP: JRING
12. APP support language: multilingual languages

Packing list:
Smart ring x 1
Charging cable x 1
User manual x 1
Original retail box x 1