Nektar Impact GXP88, 88 Key USB Keyboard, 88 Velocity sensitive, half-weighted full size keys with aftertouch, 14 RGB LED buttons for MIDI, key repeat, and Nectarine features, Pitch bend and modulation wheel, 1 Endless push encoder for key repeat tempo control / Nektarine control, Octave and transpose buttons, Note repeat button with LED tempo indicator, 7 Transport buttons, Extended transport functions: Loop on/off, click on/off, go to locator, and undo, Class Compliant for true Plug and Play, Power supply: USB or external 9V power supply (not included), 2 Sustain pedal connections, 1 Expression pedal connection, MIDI out, USB, Dimensions: 1345 x 230 x 80 mm, Weight: 8.2 kg, Compatible with Windows Vista, 7, 8, 10, MAC OSX 10.7 or later, Linux Ubuntu 14.04, iOS compatible in conjunction with Apple Camera Connection Kit (not included), Including Steinberg Cubase LE software (download)