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Keep track of vehicles entering and exiting your property with this Mighty Mule FM231 Wireless Driveway Alarm. It uses reliable electromagnetic detection technology. This Mighty Mule driveway alarm includes a transmitter module, a sensor, a receiver, three mounting posts and a transformer. It's designed to only detect vehicles and won't give a false alarm due to movement of animals or children.

Mighty Mule FM231 Wireless Driveway Alarm: For use with: 9V219, 8RLJ4, 8DFT2, 9JH02 Includes: transmitter module, sensor, receiver, 3 mounting posts and transformer Item: vehicle exit sensor Length: 16.75" Type: wireless alarm Low battery indicator on both the indoor receiver and transmitter Requires 2 AA batteries (not included)