Miditech K32s, USB Master Keyboard, Class Compliant, 32 Velocity-sensitive mini keys - 10 note polyphony, Internal General MIDI tone generation with 128 sounds and 5 drum sets, Octave +/- buttons, Volume slider, Combined pitch bend & modulation ribbon slider, Velocity adjustable in 3 steps, Transpose function, Reverb can be activated for internal sound generation, Sustain pedal connection, Integrated loudspeaker, Headphone output, USB powered, Optional battery operation possible, Dimensions: 424 × 117 × 31 mm, Includes USB cable and Miditech Free Software Bundle