From Manufacturer
The Behringer CMD MM-1 4-Channel MIDI DJ Mixer Module is designed for use as a MIDI-controlled mixer for DJ software. It provides control for up to four channels. Each channel features a 60mm level fader, 4-band EQ rotary encoders, and backlit Cue button. The unit has a 45mm crossfader as well as a dedicated encoder for browsing your sound library. Its LED peak meter allows you to keep an eye on your levels.
The CMD MM-1 can be locked together with other optional CMD controllers. It has a built-in four-port USB hub, enabling it to power other USB devices and route hard drives or audio interfaces. All of the unit's buttons are MIDI-reactive and correspond to what is going on in your software.
Compatibility
The CMD MM-1 works with any MIDI compatible software, such as Traktor, Serato Scratch Live, and Ableton Live