These sweet Tesla Electric Parking Brake Controllers are manufactured right here in Pennsylvania. Kits include the Parking Brake Controller, a Model S Install Kit, a dual LED push-button, and two used Tesla Model S Parking Brake Calipers. The components come pre-tested and are guaranteed to work together. 

When the push-button is pressed to SET, the calipers close until a specific pressure is attained and the indicator illuminates red.  When the push-button is pressed to RELEASE, the calipers open to a specific distance and the indicator illuminates green.

Please note, even though the Model S was originally manufactured for 4 wires and the Model 3 for 2 wires, our system uses only 2 wires for both vehicles. Tesla simplified to 2 wires, thus so have we.