Optex AX70TN Weatherproof Infrared Beam Motion Detector， 70'<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"> Mount transmitter and receiver up to 165 ft. apart </span></li><li><span class="a-list-item"> When beam is broken NC contacts open </span></li><li><span class="a-list-item"> Dual pulsed IR beams reduce false alarms </span></li><li><span class="a-list-item"> Resistant to rain， fog， snow and frost </span></li><li><span class="a-list-item"> Automatically adjusts trigger sensitivity level for slowly changing weather conditions </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31igk5H0ZkL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31i5tBJAFlL.jpg" noproxy>