This EasyHeat(R) de-icing kit stops ice dams from forming and causing roof and substructure water penetration damage. It channels in mild temperatures the accumulating water to permit flow through to the eavestrough and downspouts. It has a 20-ft wire, 5 W per linear foot and plugs into a GFI 120 V outlet. The RS-2 control is optional (highly recommended) for this type of application. The kit includes roof clips and spacers. 2-year limited warranty.