The Citronic Combination CD/USB/SD Player features a 2U 19 rack-mountable chassis that is perfect for background music installations. The front load CD player is equipped with 20 seconds anti-shock protection and is compatible with CD CDR and CDRW discs. The front panel of the Citronic Combination Player has a SD card slot and a USB connector to accommodate external storage devices. The large backlit display and intuitive controls allow you to quickly browse folders while also providing you with track information.