jetdaisuke does his thing with the Korg nanoKey.

Korg is now shipping three products in its new nanoSERIES of slim budget USB-powered controllers, a budget line of mobile music controllers:

At 12.6″ W x 3.27″ D x 0.55″ H and 0.49 lbs., the 25-key velocity-sensitive nanoKEY is a MIDI keyboard controller in an ultra-compact package. The keys can be set to send MIDI control [...]

Korg has introduced version of the Nano Controllers in black.
These controllers are cool because they are small, they’re modular and they’re cheap.

The nanoKEY features a 25-key velocity-sensitive keyboard that’s ideal for song production. The keys can also be set to send MIDI control data, further expanding its power.
The nanoPAD features 12 highly responsive trigger pads, [...]

Korg has introduced the new nanoSeries line of MIDI control surfaces, designed for mobile music-making.
The lineup includes three products: nanoKEY, nanoPAD and nanoKONTROL:

nanoKEY is a 25-note, velocity-sensitive model. It will ship with a download code for the full version of Korg’s M1Le - a cutdown version of the synth that forms part of the Legacy [...]