The vehicle sensor is designed to be buried alongside the driveway and wires to your gate opener control on board with 50′ 15.2 m of direct burial cable included. People and animals will not activate the electromagnetic sensor; its detection radius is up to 12′ 3.7 m The 50 ft. Driveway Vehicle Sensor FM138 allows a vehicle to drive past the sensor’s 12 ft. magnetic field and will open your gate automatically allowing guests the ability to exit without a Remote FM135. Works with single and dual gates. Easy DIY Do It Yourself installation. Can be installed 3-50 ft. away from the gate. Also available are longer lengths including 100 ft.