iRig Keys is the first ultra-slim and highly portable universal MIDI controller keyboard for iPhone, iPad, iPod touch, Android and Mac/PC. iRig Keys connects directly to your iOS device via the included Lightning connector, to your Android device via the included OTG to Micro-USB cable and to your Mac/PC via the included USB cable. It can also connect to older iOS devices via an optional 30-pin cable.

http://www.ikmultimedia.com/products/irigkeys/