Expands perimeter of your Chamberlain Alert System. - This Wireless Motion Alert Sensor is an add-on to our Chamberlain Wireless Motion Alert System. Add an additional level of security by adding another Sensor to your array. These sensors are specifically constructed to detect the movement of peopl...

The Wireless Motion Alert system creates an expandable safe perimeter anywhere and is ideal for homes, businesses, worksites or any other property with no fencing. A base monitor communicates with a weatherproof outdoor sensor with an adjustable sensitivity control. It can support up to seven additi...

Chamberlain wireless motion alert add on sensor for the wireless motion alert system (CWA2000 Sold Separately). PIR sensor detects motion up to 30ft away and features adjustable sensitivity so small animals can pass undetected. Wide 120 degree angle coverage. Two year battery life. Comes with mounti...