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Driveway Alarm Wireless Infrared Motion Sensor. How It Works: When the outdoor sensor detects motion from a person or vehicle within its 12-15 ft range, it sends a wireless signal to the indoor receiver unit, triggering an audible alert 🔊.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.