hello so this unit is a single axle trailer holding a 3 cyl Perkins mechanical diesel engine that powers a "NEW AGE' generator, 8500watts, can be wired for 110 or 220. single phase 65amps, its will run 4 continuas power tools, and can handle 5. 100ft air lines at the same time. the compressor runs off the crank of the motor with a belt. the gen is bolted to the bell housing of the engine.. any questions please ask... trailer has a 2inch receiver