About This

• SIZE FIRST--Measure the size before purchasing.There are 8 sizes of inner diameter 16.5mm~22.3mm. It is recommended that the inner diameter of the thickest part of the knuckle be used as the standard for purchase. #7(Inner Diameter 17.4mm)#8(Inner Diameter 18.2mm)#9(Inner Diameter 19.0mm)#10(Inner Diameter 19.9mm)#11(Inner Diameter 20.7mm)#12(Inner Diameter 21.5mm)

Overview

• Special Feature : Activity Tracker
• Battery Capacity : 17.5 Milliamp Hours
• Connectivity Technology : Bluetooth
• Wireless Communication Standard : Bluetooth
• GPS : No GPS
• Shape : Round
• Screen Size : 1
• Brand : viohead
• Model Name : Smart Ring Health Tracker
• Style : Elegant