Expandable Control Surface with Nine Motorized Faders, Eight V-Pots, Over 50 Buttons, and USB. The Mackie Control Universal Pro control surface completes your music production software to give you ultimate hands-on control of your mix. Nine motorized, touch-sensitive Alps faders, eight V-Pots and more than 50 master buttons let you tweak parameters to your heart's content. Unlike generic MIDI controllers, the MCU Pro employs a sophisticated communication protocol that delivers ultra-precise control, makes setup easy - no mapping required - and enables you to see your mix in action with real-time visual feedback via the huge backlit LCD and eight LED rings.