9-22 KW, Air Cooled Generator Battery Heater, 240V, 40W, .17A, For Use On Generac Air Cooled Standby Generators, Use With The Oil Heater In Areas Where The Temperature Falls Below Freezing, Pad Warmer Rests Under The Battery, Turns On 40 Degrees Fahrenheit & Turns Off 55 Degrees Fahrenheit, Only Compatible With Units Manufactured In 2008 To Present, 1 Year Limited Warranty.