BEHRINGER COMMAND Series DJ Controllers give you what youve been looking for a modular system of controllers that can be put together to suit your software needs. Each module is packed with professional features from high quality faders to extensive MIDI feedback, plus those features are organized into logical groups. This gives you a clear idea of what each module is for and how it can be used, without needing to read a manual first. And all CMD controllers are class-compliant, meaning that no additional drivers are required just connect and go.CMD MM-1 Mixer Control ModuleThis is where it starts if you want to create a multi-module controller. The MM-1 emulates the experience of a 4-channel DJ mixer, with professional faders, output metering, channel cue selection, 4-band EQs, and master/cue control. These features are laid out just as they would be on a traditional DJ mixer, so you instantly feel comfortable.But since the MM-1 is also a powerful MIDI controller, it also includes support for scrolling through your song library (or scenes in Ableton Live) and navigating your file system. Since all buttons and encoder rings respond to MIDI feedback, youll always know at a glance when something changes in your software.So, its a great mixer-controller but what makes it a good backbone for a multi-module MIDI controller? The lack of available USB ports is a common problem for many DJs, so Behringer incorporated a powered 4-port Multi-TT hub into the MM-1. Its USB 2.0 compatible, so feel free to use it not only for other MIDI controllers, but also for hard drives, audio interfaces, or even gooseneck lamps. And since its a Multi-TT USB hub, you get full speed from each port. You never have to worry about finding the right powered USB hub for your DJ or production work.