Guardline Extra Sensor for Original Driveway Alarm

Additional sensor compatible with the Guardline 500 ft Motion Sensor. This sensor is NOT compatible with the 1/4 Mile Guardline Motion Sensor. Add up to 4 sensors per zone (for a total of 16). Sensor has a 40 ft. detection range. Weather resistant and ready to withstand the elements. Compare to Ring Doorbell & Ring Home Security.