Behringer Pro Mixer DJX900USB Professional 5-Channel DJ Mixer Professional 5-channel ultra-low noise DJ mixer with stylish, black design 45-mm infinium contact-free" optical crossfader with adjustable tension and fader curve for years of use State-of-the-art 24-bit digital effects with advanced parameter control Built-in USB interface for recording and playback of any digital music file. Works with your PC or Mac* computerno setup or drivers required Intelligent dual auto-BPM counter with time and beat sync display