iRig Keys 2 Mini ultra-compact MIDI keyboard controller
https://www.ikmultimedia.com/irigkeys...
iRig Keys 2 Mini offers 25 velocity-sensitive mini-keys, skipping the pitch and mod wheels but keeping all the other great features of iRig Keys 2 for a totally backpack-ready rig. Whether you’re looking to trigger an analog synth or create a beat on your iPhone, iRig Keys 2 Mini will always be there, ready to go.