Nektar Impact GXP61, USB Keyboard, 61 Velocity-sensitive semi-weighted ""full size"" keys with aftertouch, 14 RGB LED buttons for MIDI, Key Repeat and Nectarine features, Pitch bend & modulation wheel, Endless push encoder for key repeat tempo control and Nektarine control, Backlit Octave and Transpose buttons, Note repeat button with LED tempo indicator, 7 Transport buttons, Transport functions: Loop on/off, Click on/ off, Go To Locator and Undo., Class Compliant for true Plug and Play, Powered by USB or external 9V power supply (power supply not included), 2 Sustain pedal connections, 1 Expression pedal jack, Midi-Out, USB, Compatible with Windows Vista, 7, 8, 10, MAC OSX 10.7 or higher, Linux Ubuntu 14.04, IOS compatible in conjunction with Apple Camera Connection Kit (not included), Dimensions: 965 x 230 x 72 mm, Weight: 5 kg, Incl. Bitwig 8-Track software (download)