Whether your devices need traditional USB or wireless Qi technology to charge up, the Prime® Wireless-Charging-Dock Wall Tap has you covered. To install, remove the center screw of your existing wall outlet and plug this in. A longer replacement screw comes with the dock so you can secure it in place. The convenient built-in ledge supports your phone, whether you are using Qi® technology or the USB ports. And the 2 AC outlets ensure you are not losing the traditional electric plug usage of your standard wall outlet..