The AKAI MPK 249 is a 49 key USB MIDI keyboard offering a host of software features hardware controllers including pads, faders and encoders and sophisticated software integration, built-in arpeggiator MPC note-repeat and MPC swing! The AKAI MPK 249 will unleash your creativity with intuitive and performance orientated work methods. Included with all MPK keyboard controllers is Ableton Live Lite and a couple of other software sweeteners. The action on the MPK 249 is better than average. The MPK 249 has velocity sensitive semi-wighted synth style keys with aftertouch.