A:AnswerThere is a small very easy to read user manual in the Box. The device plugs into the cigarette lighter. You can sync your phone via Bluetooth or with a direct audio cable. Then you can play whatever you have synced to the device or attached via audio cable through the speakers in your car. It is easy to set up and do. It also acts as a hand free device for phone calls. If someone calls you your phone will go to speaker and you can talk that way. You will hear them responding to you to the speakers of your car.