IP54 Rated WaterproofEach inlet/outlet of the IP54 outdoor extension cord box is equipped with a wire limit snap and rubber seal wrap that can be tightly formed around the cords perfectly keeping the extension cord box watertight, to protect outdoor & indoor plug connections to ensure circuit safety. (Note: It is just water-resistant. Do not submerge it in water) HEAVY DUTY & WEATHERPROOFThis weatherproof electrical connection box is made with heavy-duty reinforced PP material that can withstand external damage, shocks or drops, and extreme weather such as heavy rain and snow, providing continuous protection of connections from electrical hazards. When used, please place it horizontally and do not use it tilted or upside down