Before you can use the bluetooth headset it must be paired (mated) with the device. In this example we are going use a cell phone. The cell should have bluetooth technology. Locate the bluetooth menu in your phone and enable the bluetooth, then select search, then enable the pairing mode on the headseat which is usually just pressing and holding the on/off button for a few seconds until it flashes. When the cell phone has found the device, it will be displayed and ask for an unlock code which is most of the time five zeros (00000) if not check headset manual for unlock code.After the code is entered the headset is saved and you should not have to pair it again.