Features: 25 velocity-sensitive mini-keyboard keys. 4 programmable memory banks. 6 control buttons: Edit Mod down / up Octave down / Octave up. 1 rotary knob for tone adjustment. Plug and Play USB 2.0 cable no need of driver installation. USB bus powered - no additional power cable needed. Specifications: Color: Black Material: Operating system: Support for Win 8 / Win 7 / Win XP / Win Vista / OSX. Item size: 34 * 10 * 3cm / 13.4 * 3.9 * 1.2in Item weight: 407g / 14.4oz Package size: 39 * 11 * 5cm / 15.4 * 4.3 * 2in Package weight: 544g / 19.2oz Package List: 1 * MIDI Keyboard Controller 1 * USB Cable