Talk time: the longest 10 hours Standby time: up to 1-5 days 1.Open the switch of bluetooth headset 2.Open the phone bluetooth function 3.Hold the multifunction button bluetooth more than 8 seconds (red blue lights started flashing) ， bluetooth headset has opened 4.This time， the mobile phone can search to the bluetooth headset 5.Then click the bluetooth name ， enter "0000"， waiting for the headphones Technical parameter 1， bluetooth version: V2.0 compatible V1.5 V1.2， V1.1， V1.0 2， the transmission power: Class2 3， wireless frequency: 2.4-2.48 GHz 4， the transmission distance: as far as 10 meters 5， charging time: 2-4 hours 6， product size: 150 x 75 x 155 MM Package Includes: 1 x Bluetooth Headset 1 x Ear Hook 1 x Charge cable 1 x English User Manual Note: this item come without retail box