The Q-D1 MKII is a 2-channel Pro DJ mixer (2 Phono, 2 Line, 1 Mic input)  It features Gain, treble & bass control for each channel - Master, Microphone & Cue level volume control - Cue monitoring between channels and Fader “Q” Start (crossfade directly to a pre-programmed cue point when used with an American Audio Q Series Mixer).