The DuroMax XP13000HXT features Tri Fuel Technology: This generator runs on gasoline, propane, and natural gas, giving you the freedom and flexibility of fuel choice. Gasoline is a tried-and-true fuel option that’s readily available. Propane is a cleaner burning fuel that is cost effective, fuel efficient, and has a long shelf life. Natural gas has the benefit of providing you with unlimited fuel supply and hooks up directly to your home’s gas line, so you don’t have to worry about storing tanks and spills. This XP13000HXT also features a Cast-Ironed Sleeved, 460cc Engine delivering a peak of 13000 surge watts / 10500 Constant. This is a sufficient amount of power that can handle high requirement loads as well as multiple small load appliances simultaneously. Designed for Safe and Easy Operation, the XP13000HXT features a user-friendly, Electric Start, that's as simple as starting your car. It is also equipped with a recoil start in case of the battery being drained. Solid-Fill tires are also standard, they will never run flat, and high leverage handles that make it easy to transport over every terrain. (except water - we are working on skus). The attached oversized noise reducing Muffler has a built-in Spark Arrestor for safe use in mandated camping areas and jobsites. All DuroMax Generators are user-friendly and are ready to use out of the box within minutes. Simply remove all packaging, assemble the wheels and handles, add Oil and Gas and it is ready to begin producing power.