Guardline Extra Sensor for Original Driveway Alarm<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"> Extra sensor compatible with the original Driveway Alarm by Guardline. </span></li><li><span class="a-list-item"> This sensor will NOT work with the Guardline 1/4 range driveway alarm . The 1/4 mile extra sensor must be purchased to work with the 1/4 mile range driveway alarm. </span></li><li><span class="a-list-item"> A total of 16 sensors can be added to the driveway alarm set， offering complete coverage of your property. </span></li><li><span class="a-list-item"> Lifetime Manufacturer Warranty </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31JzGy6U5pL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31R2QSCwg8L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41i4tdQUTAL.jpg" noproxy>