Cartell Exit Wand 300 ft. CP-2 has no output board and works with all operators and all voltages. The CP-2 Sensor System is an electronic vehicle detection device based on the science of electromagnetic induction. All the electronics are build-in the sensor package that is supplied with 100', 200', 300', or 500' of underground burial cable. The sensor responds to the movement of a vehicle only and is unsuitable as a hold open loop. No Sensitivity Adjustment. Covers 12' wide driveway from side of drive, RFI/EMF protected.