The first model is the Korg nanoKey2 that comes equipped with 25 velocity-sensing keys and an advanced design for reliable recording. This USB-MIDI controller can be used with the Korg Kontrol Editor software, which is available for free on the Korg website. The second model is the Korg nanoPad2, which is designed for entering drum parts. This gadget features 16 responsive pads and an X-Y touchpad. And the third model is the Korg nanoKontrol2 that has several knobs, switches, and faders for controlling any DAW computer based DAW or any other music production software.Korg Releases nanoSeries 2 USB Controller