Yamaha EF3000iSEB, 2800 Running Watts/3500 Starting Watts, Gas Powered Portable Inverter The Boost Control Unit (BCU) senses when extra power is needed and boosts output for up to 10 seconds Sound absorbing material, used in key locations, does not resonate sound. Newly designed muffler and molded fan produce unbeatable noise reduction Greater fuel efficiency and noise reduction by automatically adjusting engine speed to match the load Continuous operation for up to 19 hours without refueling Recharge 12 volt batteries for RV, auto, or marine, etcetera