The Champion Power Equipment 5500-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. Featuring Cold Start Technology, Extended Run Time, and an easy to read fuel gauge. With a 0.5-quart oil capacity (included 10W-30) and a low oil shut-off sensor, this inverter operates at an ultra-quiet 61 dBA from 23 feet, which is about as loud as normal speech. Our Quick Touch Panel offers fast access to all your controls. The Intelligauge with Power Meter monitors voltage, frequency and operating hours, while Economy Mode monitors power consumption in real time to reduce engine wear and tear. As the electrical load is reduced, the inverter reduces engine speed, providing quieter operation, extended engine life and higher fuel economy. 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.