Specification: Bluetooth 4.0 smart bracelet.low-energy consumption Two control mode: Touch Screen control，Gesture control USB design for charging，PC Machine，TPU strap Waterproofing grade:IP67 0.91\' OLED display Call ID display，SMS notification，message push: Facebook，Twitter Pedometer:Steps，distance， calories calculation and display Self-timer; Find phone function Vibration Alarm clock function，timing function APP support available--download app "Zeroner" from google play or app store 3D Senser Lithium ion polymer battery: 75mAH，Standby time:5~7 days USB charge，full charge only need 30 minutes Size 46*18.7*7.9mm(Machine) Unit Weight.22g