Pioneer CDJ-850 Professional Multi-Format Media CD/MP3 Player With USB Compatible Media and Formats - The CDJ-850 is compatible with MP3, AAC, WAV and AIFF digital audio formats recorded on USB storage devices or CD-R/RW discs. USB Export Capability - DJs using the rekordbox software can easily export their music files and custom managed data onto a USB device and quickly plug in directly to the CDJ-850 and access tracks without the need to be linked to a PC. Tag List Function - Equipped with an editable Tag List functionality, users of the player can easily register tracks during play or preview to add to their playlist queue.