Runs great, we took it out of the box and assembled it. The Champion Power Equipment 201279, 4250-Watt Dual Fuel Portable Generator with CO Shield is the perfect combination of versatility and convenience. Whether you need power for your home or next project, Champion Power Equipment makes powering your life more convenient than ever. Designed with a low oil shut-off switch, this unit includes 0.5-quarts of 10W-30 oil and a 6.5-foot propane hose with a built-in regulator.Using gasoline, the 224cc Champion engine will run for 14 hours at 50% load when the 4.7-gallon fuel tank is full. It will run for 10.5 hours at 50% load when using a 20-pound propane tank. With a noise level of 68 dBA from 23 feet, which is a bit louder than a vacuum, this machine can provide home backup in an outage, plus the Volt Guard protects your appliances from electrical voltage https://offerup.com/redirect/?o=c3Bpa2VzLkNP 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. Meets the requirements of ANS/PGMA