Used less than a dozen times, comes with USB cable. Holds good charge and connects easily to iPads and other BLE devices. Runs for hours on batteries, still haven’t had to charge the ones I used in it.

61 Natural Touch mini keys let you play comfortably across 5 octaves

• Velocity-sensing keybed makes it easy to add natural expression to your performances
• Full set of hands-on controls includes a pitch wheel, a mod wheel, and octave selection
• Runs for about 30 hours on just 2 AA batteries or USB power for wired use
• Connect to your computer or mobile device via low-latency Bluetooth LE
• Core MIDI compatibility provides plug-and-play compatibility with any Mac computer or iOS mobile device
• USB provides all the power you need, even when connected to your iPhone or iPad
• Plug in an optional sustain pedal (not included) for damper control

The microKEY-61 AIR from Korg is a slim MIDI controller with a pitch wheel, a modulation wheel, and a set of 61 velocity-sensitive Natural Touch mini-keys. If you wish, you can bus-power this unit via the USB port, but the microKEY Air also features Bluetooth capabilities, allowing you to connect wirelessly to Mac and iOS devices. Hooked up in such a fashion, the keyboard can last up to 30 hours on two AA batteries (alkaline are recommended).

An assignable switch jack allows you to plug in a sustain pedal, while two octave-shift buttons allow you to change the range of this three-octave unit. You can make edits to MIDI parameters using the Korg KONTROL Editor software, which is available for free download on the Korg website. This can be useful in customizing the microKEY Air to your specific sensibilities, such as adapting the instrument's velocity curve to your individual touch.

ControllerUSB-powered by your computer, iPad, or iPhoneBluetooth compatibility with Mac and iOS devices61-key, velocity-sensitive Natural Touch mini-keyboardIncludes pitch wheel, mod wheel, and two octave-shift buttonsIncludes jack for sustain pedal