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 RGB 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 the standard 3.5mm TRS MIDI Out jack. USB 2.0(FULL SPEED) interface, compatible with Win XP7810Vista and OSX, drive free and hot-plug supported; Power supplied by USB. Specifications: Model: Orca mini25 Color: Black + White Operating system: Compatible with Win XP7810Vista 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