SD Card and USB fits easily in the back
Mobile SD/USB/MP3 Compatible Player w/ Built-In FM Transmitter
This is a neat little FM modulator that plugs into your car’s cigarette lighter. Equipped with a digital LCD display that shows track information, line-in function, and SD/USB input, it’s capable of playing MP3s in all sorts of formats.
Hook up your iPod, or plug in a USB stick with your favorite music. The FM transmitter operates on over 200 different channels from 87.5 to 108 MHz, so you’ll be able to find the perfect station for streaming your music.
The screen displays relevant track information. Includes a fully functional remote control.