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An extremely reliable driveway alarm that is used to detect vehicles only. The transmitter operates on one 9-volt battery and has 50' of direct burial wire connecting the probe to the exterior case. The probe is buried parallel to the driveway, and will detect vehicles passing within approx. 10 - 12 feet. When a vehicle drives by, the transmitter sends a signal up to 600 feet away. Order extra transmitter (#1223) or receiver (#1123).
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