PowerCode MCT-302 Magnetic Contact Transmitter<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"> Fully supervised magnetic contact transmitter </span></li><li><span class="a-list-item"> Designed primarily for protecting doors and windows </span></li><li><span class="a-list-item"> Uses a built-in magnetic contact that operates in conjunction with a magnet to detect the opening and closure of a door or window </span></li><li><span class="a-list-item"> Easy to install and operate </span></li><li><span class="a-list-item"> Includes standard long-life lithium battery </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31WO5z8V6dL.jpg" noproxy>