Lifan Energy Storm ES4000 4000 Watt 7 HP OHV 211cc 4-Stroke Gas Powered Portable Generator 4250 Watts maximum AC output/3500 Watts rated AC output 7hp Lifan industrial grade OHV gas engine - 100% copper wound alternator (See details in attached pictures); Battery not included 4 gallon fuel tank , 12 hour run time at 50% load Voltage selector switch allows total wattage and amps to be channeled to the 120v receptacles for additional starting and running power (See details in attached pictures) Receptacles 2 each-120V 20amp, 1 each-120/240 30amp AC, 1 each- 120V 8.3amp DC, AVR for stable voltage output (See details in attached pictures)