The Champion Power Equipment 9200-Watt Tri-Fuel Portable Natural Gas Ready Generator with CO Shield is a reliable source of power with the flexibility you need. When you are not running your generator on natural gas, you also have the option of operating it on gasoline or propane. Using gasoline, the 459cc Champion engine produces 11, 500 starting watts and 9200 running watts and will run for 10-hours at 50% load when the tank is full. When using a 20 lbs. propane tank with included 6 ft. propane hose assembly, it produces 10, 625 starting watts and 8500 running watts and will run for 5-hours at 50% load. This generator has a noise level of 74 dBA from 23 ft., which is a bit louder than a vacuum. The covered outlets include a 120-Volt/240-Volt 30 Amp locking outlet (L14-30R), a 120-Volt/240-Volt 38 Amp outlet (L14-50R) and two 120-Volt 20 Amp GFCI duplex household outlets (5-20R). CO Shield technology monitors the accumulation of carbon monoxide (CO), a poisonous gas produced by engine exhaust when the generator is running. If CO Shield detects unsafe elevated levels of CO gas, it automatically shuts off the engine. CO Shield is not a substitute for an indoor carbon monoxide alarm or for safe operation. DO NOT allow engine exhaust fumes to enter a confined area through windows, doors, vents or other openings. Generators must ALWAYS be used outdoors, far away from occupied buildings with engine exhaust pointed away from people and buildings.