Add-A-Motor Chicken Coop Automatic Motor (D20)<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"> Automatically opens and closes your chicken coop door according to a customizable time schedule </span></li><li><span class="a-list-item"> Easily attaches to wood， aluminum and plastic doors up to 10 pounds， with openings up to 20" </span></li><li><span class="a-list-item"> includes door safety connector that prevents damage if door is frozen closed or jams </span></li><li><span class="a-list-item"> Motor operates automatically on a time schedule when plugged into an AC lamp timer switch </span></li><li><span class="a-list-item"> Motor automatically stops at open and closed door positions you set </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41WpoH4XmLL.jpg" noproxy>