We say:

The MicroKey Air builds on the success of the original Micro Keyboard and adds bluetooth connectivity; so NO MORE WIRES. Sync the MicroKey Air with your chosen device and you're good to start creating with your recording software. The Great thing about bluetooth is that it's easy to set up, and you can plug into both Laptops, PC's and iOS devices so that you can create a truly mobile composing rig.

Korg says:

A compact, bluetooth MIDI controller keyboard with pitch bend and modulation wheels and sustain pedal input. Connect via bluetooth or USB and start creating music with the free suite of software that's included! Ideal for home studios or mobile music making.