Features: 25 velocity sensitive -keys with 3 velocity curve and 1 constant velocity; 8 Assignable rotary knobs each can be edited by user. 16 velocity & pressure sensitive performance pads with backlit can be assigned easily as pads MIDI note buttons. 2 touch sensors of dynamic bend and modulation touch strips; Play and record transport control buttons. Powerful and creative Arpeggiator for generating ideas quickly; Fixed Chord mode; Brilliant OLED display for immediate parameter setting. 6.35mm standard sustain pedal jack compatible with switch pedal; you can also connect to your hardware with standard 3.5mm TRS MIDI Out jack. USB 2.0(FULL SPEED) interface compatible with Win XP/7/8/10/ and OSX drive free and hot-plug supported; supplied by USB. Specifications: Model: mini25 Color: Black + White Operating system: Compatible with Win XP/7/8/10/ and OSX. Item size: 31.9 * 19.3 * 5cm/ 12.6 * 7.6 * 2in Item weight: 800g/ 1.8lbs Package size: 38.5 * 22 * 5.5cm/ 15.2 * 8.7 * 2.2in Package weight: 1115g/ 2.5lbs Packing List: 1 * MIDI Controller 1 * USB Cable 1 * 3.5mm to MIDI Cable