Asparion D400T, DAW Controller, Base unit of the D400 system, Universally applicable user interface for all common recording programs, Control transport functions, High-resolution jog-shuttle wheel, 2 Programmable buttons, 4 Freely programmable encoders with LED ring, 4 Encoders for EQ control, Can be extended with up to 8 D400Fs (article no. #458511#, not included), Supported protocols: Mackie Control, HUI, MIDI, Supported operating systems: Windows Vista or later, Linux, Mac OS X., Computer connection via USB-B port, USB Powered, 2x 6.3 mm inputs for expression and sustain pedal, Programmable via