Feature:1. 25 assignable velocity-sensitive keys with excellent performance; 8 assignable trigger pads with colorful backlit in working status, comfortable and accurate.2. 4 MIDI control groups: 4 assignable control knobs plus 4 assignable control sliders; 4 banks for different settings.3. 8 control buttons: CC Mode, Mod, Bank, Prog, Pitch down, Pitch up, Octave down, Octave up.4. USB 2.0 Plug and Play, no need of driver installation; USB bus powered and no additional power cable needed.5. Compatible with Win10/ Win 8 / Win 7 / Win XP / Win Vista / Mac OSX; and compatible with CAKEWALK and other mainstream music software.Specification:Features:25 assignable velocity-sensitive keys with excellent performance; 8 assignable trigger pads with colorful backlit in working status, comfortable and accurate.4 MIDI control groups: 4 assignable control knobs plus 4 assignable control sliders; 4 banks for different settings.8 control buttons: CC Mode, Mod, Bank, Prog, Pitch down, Pitch up, Octave down, Octave up.USB 2.0 Plug and Play, no need of driver installation; USB bus powered and no additional power cable needed.Compatible with Win10/ Win 8 / Win 7 / Win XP / Win Vista / Mac OSX; and compatible with CAKEWALK and other mainstream music software.Specifications:Color: Black + WhiteMaterial: PlasticOperating system: Support for Win10/ Win 8 / Win 7 / Win XP / Win Vista / Mac OSX.Item size: 32 * 19 * 3cm / 12.6 * 7.5 * 1.2inItem weight: 745g / 1.6lbsPackage size: 36 * 22 * 5cm / 14.2 * 8.7 * 2inPackage weight: 970g / 2.1lbsNote:Not support for Windows 98, Me, NT and 2000.G3/G4 accelerator cards are not supported.Package List:1 * MIDI Controller1 * USB CablePackage List:1 * MIDI Controller1 * USB Cable