Lifan Platinum Series LF4000EPL 4000 Watt Commerical/Contractor/Rental Grade 7 HP 211cc OHV Gas Powered Portable Generator with Electric Start and Wheel Kit 4250 Watts maximum AC output/3500 Watts rated AC output - GFIC protected AVR for stable voltage output (see details in attached pictures) 7hp Lifan industrial grade OHV gas engine (Battery not included) Clean power low distortion THD alternator 5% or less - 100% copper wound alternator (See details in attached pictures) 4 gallon fuel tank , 12 hour run time at 50% load; auto idle feature for power on demand; OSHA certified Voltage selector switch allows full wattage and amps to be channeled to 110v receptacles for additional starting and running power; AVR for stable voltage output (See details in attached pictures)