Smart Ring with Sleep Tracking & Fitness Monitoring Features Size:07 Specification: 18 * 22 *

Specification: 18 * 22 * 6

7) Battery:  rechargeable Li-Ion  battery

Batteries are not included

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Smart Ring with Sleep Tracking & Fitness Monitoring Features Size:07 Specification: 18 * 22 *Product Details Battery capacity: 50mA Appearance dimensions: # 8, # 9, # 10, # 12 Wearing method: Finger wearing Additional features: heart rate, blood oxygen, blood pressure, heart rate variability, sleep monitoring and tracking, sleep temperature, sleep analysis Compatible platform: fully compatible Heart Rate, Blood Oxygen Health, Sleep Monitoring, Smart Ring Product Details Ring+charging cable+manual+exquisite packaging x 1 set