1, Bluetooth version 4
<br />2, input current: 5mA, input voltage: DC 5.0V.
<br />3, metal surface material: Gold magnesium aluminum alloy
<br />4, material: TPU Wristband
<br />5, watch strap with adjustable length: 157mm to 205mm
<br />6, battery capacity: polymer lithium battery 41mah
<br />7, equipment requirements: support Android 4.3, IOS 7 and above system
<br />8, weight: 55g