Sensel

Simply the most versatile, MPE ready, customizable USB/Bluetooth controller for on-the-go !
Very sensitive Pressure sensors let you do all sort of things thanks to a whole variety of overlays.
Usable als Trackpad, Computer Keyboard, MIDI Keyboard, MPC style controller, Drum Pads, Video Controller, Buchla Thunder style Controller.
Class compliant : Works on Win, Mac OS, iOS and Linux.

Perfect when travelling and very handy live and in the studio.