Mackie Contro XT Pro, 8 Channel Extender for the Mackie Control, 100mm ALPS Motorfader, 8 V-Pots with LED-Ring, LCD Display, Rec-, Solo-, Mute-Taster, controller for software recording systems (DAWs). Compatible with Cubase SX, Emagic Logic, Nuendo, Pro Tools, MOTU Digital Performer and others, Windows and Mac compatible