Korg nanoKEY 2 - color: black, USB MIDI Controller, 25 Keys with touchsensitivity and 4 Velocity-curves, Pitch-pad (Up/Down), Octave-Shift-pad (Octave range -4 / +4), Modulations-pad, Sustain-pad, connection: USB-Mini, USB buspowered (less then 100 mA), dimensions: 325 (W) x 13 (H) x 83 (T) mm, weight: 244 g, incl. USB-cable and Softwarebundlesupports Apple iPad OS 4.2.1 and higher, Requirements: Apple Camera Connection Kit, iPad App must support Core MIDI (Korg does not take responsibility of compatibility! Problems could accur whenever Apple changes the OS and/or releases new models!), active USB Hub recommended