The iKey is a 25-key compact USB controller, and it packs a lot into a small space. It has touchstrip modulation and pitch controls, a sustain button for pedal-free operation, octave up & down controls, and velocity-sensitive synth-action keys. This keyboard also features a second USB pass-through port to daisy chain with another i-Series controller. - Extremely compact – perfectly sized to work with MacBook computers - 25 Velocity-sensitive synth-action keys - Touchstrip modulation and pitch bend controls - Sustain button for holding note release - Octave up/down buttons provide full 88-note support - Dimension: 325 x 99 x 45 mm - Weight: 0,6 kg - Colour: White.