Smart Ring Heart Rate Blood Oxygen Sleep Monitoring Ring Waterproof Multi-function

Product information:
Color: Black 7 #(inner diameter mm), Black 8 #(inner diameter mm), Black 9 #(inner diameter mm), Black 10 #(inner diameter 20mm), Black 11# (inner diameter mm)
Additional features: Heart Rate/blood oxygen/sleep monitoring/distance/calories/all-day step statistics/motion sensing game
Packing List: smart ring, charging cable, manual, packing box
Applicable people: general
Battery capacity: 20mAh
Wearing method: finger wearing
Material: Metal

Packing list:
Metal Smart ring+charging cable+ manual+ packing box x 1pc 

Product Image: