Chamberlain CWPIR motion detector

Add-on Wireless Motion Sensor Extra sensor to be used with the Wireless Motion Alert (model CWA2000) – up to 8 sensors can be used with each base station receiver. Many uses such as: driveway, patio, deck, storage shed, farm, office/worksite, and more. Box contains 1 motion sensor, mounting bracket, and hardware.
- Transmits signal to base station up to a half-mile away
- Detects motion up to 30 feet away with wide 120 degree coverage
- Adjustable sensitivity controls help prevent false alerts
- Wireless, weatherproof design makes it portable for use inside or out
- Easy to install, use, and maintain
- Requires four AA batteries
- 1-year warranty