LiftMaster 400/412/500/CSL24U/RSL12U/RSW12U (Various models use same board.)
Magnetic Autocontrol MIB 20/30/40
*NOTE* In order to get the 12 to 14 feet of detection, the vehicle must pass the sensor traveling at least FIVE MPH. Do not place sensor in close proximity to gate as it will not operate as designed. Test the application with a vehicle prior to final installation.