DuroStar DS4400, 3500 Running Watts/4400 Starting Watts, Gas Powered Portable Generator AC output rated 3500-watt / surge to 4400-watt Durable 7hp air cooled epa and carb approved engines 2 to 120-volt 20-amp 3-prong outlet + 1 - 120-volt/240-volt 30-amp twist-lock outlet Low oil shutoff sensor to protect the engine Super quiet exhaust rated at 69dba with spark arrestor