The Numark MP103USB Professional USB & MP3 CD Player supports CDs and audio files stored on USB storage devices such as key drives, thumb drives and more. Play and mix audio from standard audio CDs and MP3-CDs, and take advantage of USB storage support and access thousands of audio files from portable media. This 19" rackmountable player also delivers a host of features custom suited for professional DJs. Features that include variable pitch control, seamless loop and scratch give you the tools to mix and manipulate audio like a pro. The output connections feature balanced XLR and unbalanced RCA connectors.