ZVEX EFFECTS Vexter Fuzz ProbeThe Fuzz Probe is a kind of cross between a theremin and a fuzz factory. There is a 3 5 8 antenna plate mounted on a chunk of 3 8 clear acrylic that passes over the top of the pedal housing, angles down to sharp turn, and goes back to the pedal. Under the whole mess is a 3 5 8 by 7 sheet of aluminum that provides shielding from annoying ground effects and wires under the stage. It also serves to protect the knobs from being knocked off if you drop it