The Yamaha EF3000iS Generator is capable of producing clean, high-quality electricity with extremely quiet operation. It features a fresh, ergonomic design with a centralized control panel for easy access to controls and four built-in wheels with a parking brake for easy transport and mobility. The inverter system with Pulse Width Modulation (PWM) control can run products with built-in microcomputers, or microcomputer-controlled electric tools. The 171cc Overhead Valve (OHV) Engine provides noise-reducing operation with improved efficiency, increased reliability, and low oil consumption. Automatic decompression greatly reduces starting effort. Smart Throttle, a load sensing rpm control, provides greater fuel efficiency and noise reduction by automatically adjusting engine speed to match the load. At ¼ rated load with the Smart Throttle function on, the generator can run for up to 18.6 hours without refueling. The Oil Watch Warning System helps prevent engine damage from low oil, avoiding costly repairs and minimizing down time. With Noise Block, the acoustically designed sound reduction system, sound absorbing material is used in key locations and does not resonate sound. A newly designed muffler and molded fan produce unbeatable noise reduction at 53-60 dBA. Independent gasoline petcock helps reduce carburetor cleaning and repairs by eliminating stale gas in the carburetor. 12 Volt DC output, with battery charging cables included, allows you to recharge 12-volt batteries for your RV, auto, marine, etc. Yamaha generators have the longest emission engine life ratings issued by the Environmental Protection Agency (EPA) and the California Air Resources Board (CARB).