The Zeluga Heavy Duty Extension Cords with a lighted end come with a handy safety feature, a light indicator which shows when power is running through the cord. The bright yellow jacket that comes with it is resistant to water and abrasion and is unaffected by the weather. It’s flame retardant too. The plugs are of correct sizes with strain reliefs which ensure that the wire doesn’t separate from the plugs. Corrosion and arcing are resisted by the brass blades that are coated with nickel. They work well in temperatures ranging between as low as -40°F and as high as +140°F. They are NEMA5-15P and NEMA 5-15R single outlet clear plugs with a lighted end power indicator. These are ETL and CETL approved.