BARON 440 PRO Infrared Freestanding Gas Grill with 660 sq. in. Cooking Surface, 40,000 BTUs, 10,000 BTUs Infrared side burner, Flav-R-Wave™ Cooking System, 4 Dual-Tube™ Burners, Linear-Flow™ Valves, 180° Sensi-touch™ Control, Sure-lite™ Electronic Ignition System, and Deluxe Accu-Temp™ Thermometer: Natural Gas