WORLDE Blue whale 61 Portable USB MIDI Controller Keyboard 61 Semi-weighted Keys 8 RGB Backlit Trigger Pads LED Display with USB Cable Features: Professional master MIDI keyboard features brushed aluminum panel, clear LED display, and 61 semi-weighted keys with aftertouch. 8 velocity & pressure sensitive performance pads with RGB backlit, can be assigned easily; 8 assignable encoders, each encoder can be edited by user. 5 buttons for MMC; 6 function buttons, providing functions like PROGRAM CHANGE, CHANNEL, CONTROL ASSIGN, TRANSPOSE, OCTAVE, EDIT; 2 touch sensors of dynamic pitch bend and modulation touch strips. 2 Assignable pedal interfaces(Pedal A, Pedal B), compatible with switch pedal and continuous pedal, which can be configured to 130 controllers; 1 MIDI OUT interface. USB interface, adaptable B 2.0(full speed); Drive free and hot-plug supported; compatible with Win XP/7/8/10/Vista and Mac OSX; can be powered by USB and DC 5V. Specifications: Brand: WORLDE Model: Blue whale 61 Color: Silver/ Black(optional) Operating system: compatible with Win XP/7/8/10/Vista and Mac OSX Item size: 92.5 * 21.2 * 7cm/ 36.4 * 8.3 * 2.8in Package size: 99.5 * 26.5 * 11cm/ 39.2 * 10.4 * 4.3in Package weight: 4.4kg/ 9.7lbs Package List: 1 * MIDI Controller 1 * USB Cable