The Behringer Pro Mixer DJX900USB 4-channel DJ Mixer with USB audio interface has a powerful feature set that DJs of all levels will love. The DJX900USB's intuitive operation and built-in digital effects give you the tools to get your audience out onto the floor - and keep them there. The DJX900USB sports a USB interface for playing music from your laptop, a transparent mic preamp, and 3-band EQ across-the-board. You also get an optical crossfader, four total inputs (three with phono inputs), and three sets of outputs. With all this, it's no wonder so many DJs have made the Behringer Pro Mixer DJX900USB the center of their rig.