Chamberlain CWPIR Weatherproof Outdoor/Driveway Wireless Motion Alarm and Alert System Add-On Sensor， Includes 1 Sensor<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> Additional PIR sensor works with Chamberlain CWA2000 base receiver (Sold Separately). </span></li><li><span class="a-list-item"> Weatherproof outdoor sensor with adjustable sensitivity control. </span></li><li><span class="a-list-item"> Detects motion up to 30 feet away with wide 120-degree angle coverage. </span></li><li><span class="a-list-item"> Transmits signal to base station (Chamberlain CWA2000) up to a half-mile away in ideal situations. </span></li><li><span class="a-list-item"> Easy Installation / easy operation. 2 year battery life. Includes mounting bracket. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41xMuR5NERL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/61HiIrXvNBL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/518EKAoPM0L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51aI3dA907L.jpg" noproxy>