Generac 6438  11,000 Watt Air-Cooled Steel Enclosure Gas Powered Standby Generator with 200-Amp Smart Transfer Switch Unit runs on natural gas or liquid propane and features hands-free operation with no fueling, no manual start and no extension cords Clean, smooth True Power Technology provides safe operation of sensitive electronics Includes automatic 200-amp Smart Transfer Switch (NEMA 1, indoor rated only) 11,000 rated watts and this model is UL, CUL and EPA compliant for safety Comes with a 2-year limited warranty and is CARB Compliant