4500 surge watts; 4000 running watts337cc, 11 HP 4-stroke OHV engineVersatile 120V GFCI-protected duplex, 120V locking plug and grounded 120/240V receptaclesLarge 6.5-gallon fuel tank for up to 10 hours of continuous run time at rated loadAutomatic low oil shutdownCircuit breaker protectionFull perimeter frame protection76dB sound rating120V AC rated Amp: 33.3; rated maximum: 37.4 Amps240V AC rated Amp: 16.7; rated maximum: 18.7 Amps12V DC voltage with 8.3 DC amperage