8DB WiFi Signal Range Extender Booster for DJI Phantom 3 Advanced &amp; Professional &amp; DJI Phantom 4<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"> Designed for DJI Phantom 3 Advanced / Professional 4K drone DJI Phantom 4. </span></li><li><span class="a-list-item"> The effective transmission distance: 3.5 Km </span></li><li><span class="a-list-item"> You should install a firmware update to increase your channels to 22 channels prior to installation. </span></li><li><span class="a-list-item"> More flying remote control distance means less chance of aircraft lost contact and low risk of the plane crash. </span></li><li><span class="a-list-item"> Lightweight， durable， practical and convenient to use in compact design. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41ZRflLj96L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/4197Gr9ewrL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31cxst4dmGL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51Rf9rd9fuL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51zMJawOvlL.jpg" noproxy>