The Champion Power Equipment 4650-Watt Inverter Generator with CO Shield is ultra-quiet. With a 0.5-quart oil capacity (included 10W-30) and a low oil shut-off sensor, this inverter operates at an ultra-quiet 61dBA from 23 feet, which is about as loud as normal speech. Operate your Dual Fuel generator right out of the box on gasoline or propane, and easily switch fuels with the EZ Start dial. When the 2.3-gallon tank of gasoline is full, the 212cc Champion engine produces 4650 starting watts and 3650 running watts and will run for up to 14 hours at 25% load. When using a 20-pound propane tank, it produces 4650 starting watts and 3285 running watts and will run for up to 21 hours at 25% load. The covered outlets in this RV Ready inverter include a 120V 30A RV (TT-30R), a 120V 20A household duplex outlet (5-20R), and a 12V automotive-style outlet. 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. Meets the requirements of ANSI/PGMA G300-2018.