WRAP-ON Roof and Gutter Deicing Cable - 100' Grey Electric Heating Cord with 3 Prong Plug & 120 Volt Operation - 14100 Roof and Gutter Cables operate at 120 volt, 5 watts per foot. Can be applied on pitched roofs with non-combustible tab shingles, in gutters and in downspouts. Each package contains one ready-to-install cable, shingle clips, cable spacers and complete installation instructions. Requires weatherproof GFCI outlet with control switch. Made in USA