Amazon, Best Buy, and many smaller vendors offer a diverse range of portable Bluetooth speaker options online. Most well-rated speaker systems cost about $40, but prices can go as high as $150 depending on how complex of a system you’re looking for.
You will need to find a place either on your dashboard or in your center storage space to keep your speaker while it plays music, and their batteries will either need to be charged or replaced from time to time.
Simply plug your phone in, make sure your stereo system is playing from your “tape,” and stream music to your heart’s content!
Note: if you have a newer Apple phone, you may need a second adapter to connect the audio cord to your device.