Features 1、USB MIDI keyboard pad controller with 49 assignable velocity-sensitive keys, 1 master volume slider and 8 assignable sliders. 8 assignable trigger pads with colorful RGB backlit in working status, comfortable and accurate. 2、8 assignable knobs, programmable and 360° infinitely rotating; 8 control buttons，each button can support dual functions via the shift key. 3、6 buttons for MMC and 10 data entry buttons; Pitchbend and modulation wheels can be assigned as 135 controllers. Specification Features: USB MIDI keyboard pad controller with 49 assignable velocity-sensitive keys, 1 master volume slider and 8 assignable sliders. 8 assignable trigger pads with colorful RGB backlit in working status, comfortable and accurate. 8 assignable knobs, programmable and 360° infinitely rotating; 8 control buttons，each button can support dual functions via the shift key. 6 buttons for MMC and 10 data entry buttons; Pitchbend and modulation wheels can be assigned as 135 controllers. With 2 assignable pedal (A & B) interfaces and MIDI IN/ OUT; USB 2.0 powered, plug and play, no need of driver installation. Compatible with Win 10/ Win 8/ Win 7/ XP/ Vista/ MAC OSX; Compatible with CAKEWALK, FL Studio, Pro Tools, Ableton Live, Logic Pro, CUBASE, Studio One, Piano Apprentice, Lgrand Piano, Music Studio and other mainstream music software or APP. Specifications: Color: Black Material: Plastic Power Supply: DC 9V Power Adapter(Not included) or USB Cable(Included) Operating System: Support for Win 10/ Win 8/ Win 7/ XP/ Vista/ MAC OSX Item Size: 76.5 * 26.5 * 6cm / 30.1 * 10.4 * 2.4in Item Weight: 3.5kg / 7.7lb Package Size: 82.5 * 30.5 * 11CM / 32.5 * 12 * 4.3in Package Weight: 4.57kg / 10.1lb Note: The power adapter is not included. Package List: 1 * MIDI Keyboard Controller 1 * USB Cable Package List 1 * MIDI Keyboard Controller 1 * USB Cable