Practically miniature in both size and price, the Korg NanoKEY 2 MIDI controllers is the one of the cheapest and simplest MIDI controllers out there. USB-powered with 25 velocity-sensitive keys, the slim, streamlined NanoKEY 2 sports intuitive octave up and down controls, a Control Change mode that gives you the ability to send CC messages rather than simply notes, and modulation and sustain buttons to add expressive dynamics to your performance.