Rane Serato SL3
The SL3 gives you the freedom to take your entire digital music collection on the road with advanced Serato features that add extra creativity to your DJing. This intuitive system replicates the traditional DJing experience for "real feel" usability. The Rane SL3 USB 2.0 interface connects one, two or three standard vinyl or CD turntables to your computer using a single USB cable with audio connections to line inputs on your DJ mixer of choice.
More info about the Rane Serato SL3 can be found here.