The DM950USB is an affordable two- channel mixer with two USB audio ports built into the mixer. USB technology allows audio files to be transferred to and from your computer. Mix your computers music files with vinyl, CD, DVD or a microphone. Incorporate MP3, WMA, WAV, and other digital music files in the mix from any USB-equipped PC or Mac. Two USB ports are included so you can take advantage of the multiple sound card feature found in most DJ mixing software. Record your mix at the same time as you play back. The DM950USB from Numark is the perfect way to easily get into the modern world of computer music while still using a traditional mixing platform.