Our 224cc 4-stroke OHV engine produces up to 4500 surge watts and 3650 rated watts of power on gasoline, or 4500 surge watts and 3285 running watts on propane. The keyless electric start lets you turn on your generator with the simple push of a button, and features an included recoil pull starter as backup. The WEN Watchdog CO Shutdown Sensor helps protect both you and your family by automatically turning off the generator if dangerous levels of carbon monoxide are detected. Designed to mirror a pure sine wave, this unit limits total harmonic distortion to under 0.5 percent at no load and under 1 percent at full load. Our ultra-efficient engine paired with our extra-large 4-gallon gas tank provides up to 12 hours of half-load run time, or get the same half-load runtime from a 20-pound LPG tank. The fully-packed panel comes equipped with two three-prong 120V NEMA 5-20R receptacles, two 5V USB ports, one 120V transfer-switch-ready NEMA L5-30R twist lock receptacle, and one 120V RV-ready TT-30R receptacle. The panel's data meter monitors the voltage, frequency, total runtime, and session runtime. Low-oil shutdown, combined with the built-in overload protection and indicator lights, safeguard both your generator and your electronics from damage. Standard SAE quick-connectors make connecting and disconnecting the battery faster and easier than ever. Your dual fuel inverter generator comes backed by a three-year limited warranty.