This RJ45 coupler is qualified for outdoor use. With IP68, it is protected for temporary submersion and dust. In the short version, one part of the coupler is permanently protected, the other part is covered with a quick release fastener (screw cap), so the cap can be unscrewed if necessary and a patch cable can be connected. Perfect for installations where one side is not permanent in use and you connect just sporadic an cable on the other side.