Z VEX Tremolo Probe

A cross between a Theremin (a forerunner of the synthesizer) and a Z. Vex Super Hard-On. Has a 3 5/8" copper plate mounted on a chunk of 3/8" clear acrylic that passes over the top of the pedal housing, angles down to a sharp turn, and goes back to the pedal. A 3 5/8" by 7" sheet of aluminum provides shielding from annoying ground effects and wires under the stage. Very heavy construction!