Balfson I12 Heart Rate ECG Blood Pressure Smart Bracelet

Screen size: 1.3 inches
Material: zinc alloy shell + environmentally friendly silicone strap / metal strap
Battery capacity: 180 mA
Wearing method: wrist strap
Interface: USB 2.0
Wireless distance: 5m and below
Communication function: not supported
Wristband material: silicone