The Cartell Exit Sensor for your driveway allows exiting vehicles from your property to open the gate by driving passed the sensor. The exit sensor is a magnetic device that installs below ground beside the drive. A magnetic field is established which when interrupted by a metal object will send a signal to open the gate. The Cartell exit sensor features solar friendly design, Made in the USA quality and is backed by a 3 year . This sensor is supplied with a 80 foot cable and is typically installed inside the property beside the drive to automatically open the gatewhen a car passes. The 3 wire cable is easily connected to the Cartell control board making installation simple. This type of sensor is not a safety device.- SKU: USATMC010