Alesis Air FX effects processor / sound generator controlled by hand movements

50 built in audio effects or sound generator patches that you manipulate by moving your hand in the air over the AirFx device in x, y and z axis. One physical knob controls patch selection and lets you 'freeze' the location of your other hand or bypass the effect. To the best of my recollection I am the only owner of this thing. It is in excellent condition with one notable ding in the blue plastic, as pictured. I recently bought this replacement ac adapter as I had misplaced the original adapter.