SR02 smart ring waterproof blood oxygen exercise pedometer sleep monitoring heart rate measurement sleep monitoring fashion

Color: black 7 #, black 8 #, black 9 #, black 10 #, black 11 #, black 12 #, silver 7 #, silver 8 #, silver 9 #, silver 10 #, silver 11 #, silver 12 #, gold 7 #, gold 8 #, gold 9 #, gold 10 #, gold 11 #, gold 12 # Appearance size: 17mm, 18mm, 19mm, 20mm, 21mm, 22mm refer to the corresponding model of the international standard size code Applicable people: men and women Battery capacity: 20mAh Compatible platforms: Android 5.0 and above Wear method: ring wear System: iOS 10.0 and higher Packing list: smart ring + charging compartment/charging cable + manual