The i2-Control 37 black edition is the big brother of the i2-Control 25 black. With additional keys, in total 37, and 9 faders it gives you more functionality. Full USB powered and class compliant, works the i2-Control 37 with each Windows and Mac OSX, which supports class compliant devices. With an optional power adaptor the i2-Control 37 black works perfect with each MIDI device. 37 High Quality dynamic keys Pitch Bend and Modulation wheel 8 Controller / V-Pots 9 Fader/ Slider Data Entry Slider 3-segment blue LED Display Function-keys for Octave +/- Easy controller-programming USB MIDI MIDI Out Input Jack for sustain-pedal Colour: black Without DC connector and power switch – for standalone use please use a normal USB power adaptor USB buspowered, works with Apples iPad with camera connection kit without additional power adaptor Dimensions: 59 cm x 24 cm x 8,5 cm incl.: USB-cable Class compliant: Works driverless with Mac OS/X, Apple iOS 4.2, Windows XP SP2, Windows Vista, Windows 7 and Windows 8 Inclusive: free Miditech software bundle (download versions): Toontrack EZ Drummer lite, Magix Samplitude Silver, Makemusic Finale Notepad, Ik Multimedias Amplitube CS and Imagelines Poizone Synthesizer