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: C--C Mod, Mod, Bank, Prog, Pi tch down / Pi tch 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: BlackMaterial: PlasticItem size: 32 * 19 * 3cm / 12.6 * 7.5 * 1.2inItem weight: 742g / 26.2ozPackage size: 34 * 20.5 * 5cm / 13.4 * 8.1 * 2inPackage weight: 879g / 31ozNote:Not support for Win 98, Me, NT and 2000;G3/G4 accelerator cards are not supported.Package List:1 * MIDI Controller1 * USB CableDear customer,welcomeHave a great shopping experience.