Waterproof Switch: the 1875W outdoor extension cord has a 16A LED waterproof switch with 14 AWG SJTW cable, and powerful 15A 125V NEMA 5-15P to NEMA 5-15R grounded outlets plugs, you can put it into use with confidence indoors or outdoors Long Serving Time: the extension cord with switch is mainly made of quality OFC, with good electrical conductivity and thermal conductivity, safe and stable, which is not easy to break for long term use