Ceramic Smart Ring Heart Rate Blood Oxygen Sleep Waterproof

Product information:
Color: Black 7 #(line charger), Black 8 #(line charger), Black 9 #(line charger), Black 10 #(line charger), Black 11 #(line charger), black 12 #(line charger), Black 13 #(line charger), Black 14# (line charger), Black 7 #(charging case), Black 8 #(charging case), black 9 #(charging case), Black 10 #(charging case), Black 11 #(charging case), Black 12 #(charging case), Black 13 #(charging case), Black 14# (charging case)
Additional features: health monitoring
Packing List: packing instruction ring, charging warehouse
Applicable people: general
Battery capacity: 20mAh
Wearing method: Ring