Equipsource Welder Generator Combo Unit's engine has a voltage rating of 120v ac, rated output is 3500 watts, maximum output is 3750 watts, surge power is 4000 watts, max. amps is 20, regulation is avr (automatic voltage regulator). Control panel has 120 volt, 20a duplex: 1 with GFCI protection, master circuit breaker, idle Control Switch, volt meter, welder amperage is 60-200 amps. Engine is a lifan lf190-15 hp with electric start/recoil start system, 4-stroke/ohv/gasoline with low oil shut off protection, idle control, fuel tank is 6.5 gal/steel with steel cap and fuel gauge, run time is 8 hrs at 50 percent load, sound level is 75 db at 23ft. Includes: spark plug wrench, wheel kit with 10" rubber foam filled tire. Not for sale in California.