Audiovox AVXMTG13UHD 13" LED Overhead DVD Player w/ 2 Wireless IR Headphones Switchable 16:9 / 4:3 aspect ratio Interchangeable Pewter, shale and black trim rings and snap-on covers USB / SD inputs for digital media (4GB max on SD card) Integrated dual channel IR headphone transmitter Built-In 16 channel FM modulator with FM transmitter function (use optional FMDIRB for a hardwired FM modulator)