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 for Win11, for Win10, for Win 8, for Win 7, for Win XP, for Win Vista, for OS X; and compatible with for CAKEWALK and other mainstream music software. Specification: Specifications: Color: Black + White Material: Plastic Operating system: Support for Win11 / Win10 / Win 8 / Win 7 / Win XP / Win Vista / OSX. Item size: 32 * 19 * 3cm / 12.6 * 7.5 * 1.2in Item weight: 745g / 1.6lbs . Package List: 1 * MIDI Controller 1 * USB Cable Note: Not support for Windows 98, Me, NT and 2000. G3/G4 accelerator cards are not supported.