reporter. Read about our customers' top-rated security and surveillance products on our review page: Security and Surveillance What Other Items Do Customers Buy After Viewing This government Item? Professional Grade Wireless Outdoor Motion Sensor Detector Alert System 4.3 out of 5 stars 407 99.97 Prime Driveway Alarm - Wireless Motion Sensor Alert System with Long Range Receiver Transmitter. Wireless Voice Alarm. 278 new from 39.09 11 used from 24.78 Frequently Bought Together Total price: 76.50 Add all three to Cart Add all three to List Buy the selected items together This item:Chamberlain CWA2000 biography Wireless Motion Alert System (Black / Tan)) 39.09(39.09 / Count)) Chamberlain CWPIR Wireless Motion Alert Add-on Sensor 23.48(23.48.) easy to install, owner s Manual. E-mail: m. No wiring required. Base units uses AA batteries or included AC adapter. Quick TalkTM. Back Chamberlain CWPIR Wireless Motion Alert Add-on Sensor 4.2 out of 5 stars 791 23.48 Prime Energizer L91BP-8 Ultimate Lithium AA Batteries (8-Pack)) 4.6 out of 5 stars 2,303 13.93 Prime Chamberlain CWPIR Wireless Motion Alert Add-on Sensor (Pack.) cONSTRUCTION. WithAdvanced Features Section. In order to navigate out of this carousel please use your heading shortcut key to navigate to the next or previous heading. Would you like to tell us about a lower price? Chamberlain CWPIR Wireless Motion Alert Add-on Sensor 4.2 out of 5 stars 791 23.48 Prime Driveway Alarm w/ Lifetime Warranty.