When installed along the driveway on the inside of your property, the Driveway Vehicle Sensor will detect an approaching vehicle within a 12 foot (3.7m) radius and signal the gate opener to open. This provides "hands free" exiting of your property when guests or family members are visiting, The wired sensors are available in 50 ft. (15.3m), 100 ft. (30.5m), and 150 ft. (45.8m) direct burial wire lengths.