HotShot Satellite Dish Heater - 18-22 in. Dishes Compatible with any satellite dish that's at least 17.75 X 19.5 inches M Acrylic adhesive assures a tight bond to the antenna Automatic thermostat turns 'on' just above freezing temperatures and 'off' when the dish surface warms up Multiple heat zones apply the maximum heat where it's needed most One hundred feet of electrical cable provided