The special case Yagi allows both support a Yagi antenna thanks to two flanges 75mm diameter provided, but also shelter your wireless equipment such as a WiFi card and a booster Wifi inside the sealed box with the projections of water. The case includes two grommet screw to route the antenna wire, cord, USB or other connection. The O-ring inside the grommet will come the shape of the cable when tightening, making assembly sealed to protect your wireless equipment when used outdoors.