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<p>Driveway Patrol infrared wireless alarm system <br>Use to monitor the mailbox, garage, driveway or countless other places <br>Battery operation and 400 foot range means no wiring is necessary <br>When a vehicle or person passes the sensor, the receiver emits an audible tone Additional Details<p>Driveway Patrol infrared wireless alarm system <br>Use to monitor the mailbox, garage, driveway or countless other places <br>Battery operation and 400 foot range means no wiring is necessary <br>When a vehicle or person passes the sensor, the receiver emits an audible tone
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