If you want to play your music in your car but don't have the means, just get the RCA FM transmitter. It allows you to play music from you smartphone or other media device straight to you cars stereo. It works by transmitting over a FM channel. All you need to do is plug the transmitter into your car's 12 volt accessory port and then choose which station you want to transmit on. Then tune your radio into the same station. It's that simple! You will never be stuck in your car without your favorite music again.