Yamaha 1000 WATT PORTABLE GENERATOR Weight: 27.9 lbs. Noise Block acoustically designed sound reduction system. Molded casing, noise-absorbing glass wool construction. Runs continuously for up to 12 hours without refueling (at 1/4 load with "Economy Control" function on). Smart Throttle Load sensing throttle control automatically adjusts engine speed to precisely match load, resulting in greater fuel efficiency and noise reduction. 12-volt DC output (battery charging cables included). Recharge 12-volt batteries for RV, auto, marine, aircraft, etc. Inverter System with Pulse Width Modulation. System produces higher-quality and cleaner electricity. Dual Coil Alternator Stator for a lower engine speed. Reduced noise, fuel consumption, and engine wear. Centralized control panel enables easy access to controls. Fuel petcock reduces carburetor contamination by turning off gasoline flow and allowing the carburetor to run dry. OHV 50cc engine (overhead valve) provides improved efficiency, increased reliability, low oil consumption, and noise-reducing operation. Large fuel fill access with a wide mouth fuel fill that reduces spilling and overflow during refueling.