To power up the Bluetooth car adapter, connect it to the 12V Cigarette Light Plug (auxiliary port) in your vehicle's lighter socket. Pair your phone with this adaptor using Bluetooth (when pairing is successful, most devices make a sound). There are a few things to keep in mind, however. First, you will need to check to see if your car's sound system is compatible with the Bluetooth adapter. Second, you will need to make sure that the Bluetooth adapter is powerful enough to reach your car's sound system. If it is not, you may need to purchase an amplifier in order to boost the signal. Finally, you will need to ensure that your phone is paired withhe Bluetooth adapter before you can use it to play music or make hands-free calls. If you're having trouble connecting, make sure that the Bluetooth adapter is turned on and in range of your car's sound system. You should also check the compatibility of your car's sound system with the Bluetooth adapter.