Robin Sukroso claims his instrument is "the perfect bridge between electronic and acoustic music" and is the world's first ACPAD wireless MIDI controller for an acoustic guitar.It mounts to your guitar like a regular pickguard, and it can also work over USB, though it has its own internal rechargeable battery to enable the wireless operation.Apart from outputting MIDI from your strings, ACPAD also enables you to trigger sounds, loops and effects - check out the video to see it in action.