Midiplus AK490, USB MIDI Keyboard, 49 Velocity-sensitive keys, Pitch bend and modulation wheel, Octave selector button, 6.3 mm Jack input for sustain pedal (not included), Powered via USB or batteries (6 x AA batteries), Plug & Play for Mac and PC, USB-B port, MIDI USB output, MIDI keyboard output, Dimensions: 830 x 255 x 70 mm, Weight: 3.2 kg