The Champion Power Equipment 201531 4500-Watt Portable Inverter Generator with CO Shield is ideal for camping, tailgating, powering items around the RV or providing backup for a few basics. Power up with the reliable recoil start, plus Cold Start Technology ensures a quick start in cold weather. Just add oil (included 10W-30), and operate your Dual-Fuel generator on gasoline or propane, and easily switch fuels with the EZ Start dial. Confidently connect your sensitive electronics since this inverter produces Clean Power (less than 3% THD). Designed for safety with a low oil shut-off sensor, this model has a 0.5-quart oil capacity. Champion's Inverter Technology includes smart Economy Mode, which monitors the electrical load to reduce engine speed, noise, and fuel consumption. 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.