Being available in 2 different wattages and having our original unique design aren't the only reasons Ice Eliminator is a best seller. Our solid aluminum housing keeps the unit from falling out of the birdbath and the attractive rock-like design blends naturally with any birdbath. Spray paint any color to match any birdbath. Will not calcify, rust, or leave stains in birdbaths. Won't burn or melt plastic birdbaths. Available in either the original 50 watts for standard baths or the super 80 watts for even the largest of bird baths. MET listed. Three-year limited warranty.