Dakota Alert BBA-2500 Break Beam Alert Kit， One BBT-2500 &amp; One DCR-2500<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"> Break Beam Alert </span></li><li><span class="a-list-item"> Self-powered by solar recharged lithium ion batteries </span></li><li><span class="a-list-item"> Sensing terminals can be mounted up to 300 ft. apart </span></li><li><span class="a-list-item"> Quick and simple installation </span></li><li><span class="a-list-item"> The receiver is capable of receiving signals from up to four zones </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41LQqCv7wKL.jpg" noproxy>