Features: 25 velocity-sensitive keys. 8 backlit trigger pads. 4 MIDI control groups.(4 assignable control knobs plus 4 assignable control sliders) 4 banks for different settings. 8 control buttons: Mod Mod Bank Prog down / up Octave down / Octave up. 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 / Win10/ OSX. Item size: 32 * 19 * 3cm / 12.6 * 7.5 * 1.2in Item weight: 742g / 26.2oz Package size: 34 * 20.5 * 5cm / 13.4 * 8.1 * 2in Package weight: 879g / 31oz Note: Not support for Windows 98 Me NT and 2000; G3G4 accelerator cards are not supported. Package List: 1 * MIDI Controller 1 * USB Cable