The Champion Power Equipment 4000-Watt Inverter Generator with CO Shield is ultra-quiet and ideal for camping, tailgating, powering items around the RV or providing backup for your essentials. Power up with the reliable recoil start, plus Cold Start Technology ensures a quick start in cold weather. Using gasoline, the 149cc Champion engine produces 4000 starting watts and 3000 running watts. Connect this Parallel Ready inverter with another Champion 4000-Watt inverter for 30 Amp of power. If you purchase the optional parallel kit (not included), you can integrate 2 inverters, plus the kit has a 120V 30A locking and 120V 50A RV outlet. Champion's Inverter Technology includes smart Economy Mode, which monitors the electrical load to reduce engine speed, noise and fuel consumption. Fully assembled with hassle-free setup. 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.