The H08051 is a 10000 watt dual fuel generator. Though large in size, this runs at 74dB and is California emissions certified. Our Max Pro Series 439cc engine runs cool and efficient thanks to the Phoenix Fat Head Block. 8 gallon fuel tank provides 12 hours of run-time. Starting is as easy as the push of a button with an electric-start system. All Hybrid Series run on gas or propane, giving you flexibility. The H08051 has a 5.5 ft. propane hose for convenience using larger propane tanks and includes a 10 in. wheel-kit and high leverage folding handle. Easy information is at your fingertips with a 3-in-1 data minder measuring Hrs, Volts, and Hertz. Everything you need is in the box including: oil, funnel, owner's manual, and spark plug wrench.