Waterproof level
IP67 rating, we can wear S2 HR bracelet while we are swimming
Bluetooth version
Bluetooth V4.0
Battery capacity
90mAh Li-Poly rechargeable battery
Time for charging
1~1.5 hours
Type
S2 Waterproof Smart Band Wristband For Android 4.3 IOS 7.0
Screen size
0.96'' big OLED touchable screen