Product Description from the Manufacturer

With 50 amps and 120/240 dual voltage output, there's not much the EF12000DE can't handle during a power outage. The EF12000DE is our highest output gasoline-powered 120/240-volt output generator -- and it can be converted to run on propane or LP gas. It uses a 22 hp twin-cylinder 653cc, 4-stroke, OHV engine to deliver 12,000 watts maximum AC output with outstanding fuel efficiency. It provides over 10 hours of continuous, super-quiet operation without refueling to power up super-heavy-load equipment like air compressors, table saws, and more. Requires 12 volt battery (not included) for electric start.

Source from Amazon