Bunker Hill Wireless Security Driveway Alert System

Don�T Be Caught Off-Guard� Wireless Driveway Alert And Alarm System Warns You That Visitors Are On Their Way To Your Door This Driveway Alert System Uses A Wireless Receiver In Your Home That Will Chime When The Infrared Driveway Alert Sensor Outside Detects Motion, So You�Ll Be Prepared For That Unexpected Knock At The Door Or Beep In Your Driveway. This Driveway Alert'S Wireless Motion Sensor Mounts Outside On A Post Or Wall, And You Can Set The Receiver Anywhere In Your House (Within 200 Ft. Of The Sensor). Completely Wireless Installation Weather-Resistant Plastic Housings Mounting Hardware Included Requires One 9 Volt And Three C Batteries (Sold Separately).