Smart Ring, Sleep Tracking Wearable, Heart Rate, Fitness Tracker, for Men/Women

Bluetooth-Compatible version: 5.1
Support APP-side GPS data: yes
Heart rate sensor model: Tianyi 3918
Battery type: polymer pure cobalt battery
Working temperature: 0-50℃
Battery capacity: 16mah
Charging time: 2 hours
Theoretical standby time: 10-15 days
Usage time: 7-9 days
Charging: magnetic charging + charging box (charging box is not included in the delivery)
Compatibility: Support for Androids 9.0 and above; for Apple IOS 10.0 and above
APP: Jring
Packaging size: 80*80*30mm