It seems to be everything, at least everything I have hooked up, music on the FM or AM radio, MP3s on the SD card, MP3s on a USB device, DVD movies, AV1 (I have the Expedition's factory-fit RSE DVD hooked into the AV1 input, so no integrated IPod). I haven't tried a regular CD or the AV2 yet (does anyone put actual CDs into these players any more when there's so many preferable media options?).