The Champion Power Equipment 4500-Watt Open Frame Inverter Generator is smaller, quieter and BETTER. Quiet Technology digital components cut the noise level in half and the efficient mechanical design decreases the overall footprint and weight by 20%. Operate your Dual-Fuel generator on gasoline or propane and safely switch fuels with our patented fuel selector switch. Using gasoline, the 224cc Champion engine produces 4500 starting watts and 3650 running watts and will run for 17 hours at 25% load when the 2.9 Gal. fuel tank is full. It produces 4500 starting watts and 3285 running watts and will run for 21-hours at 25% load when using a 20 lbs. propane tank. A 6 ft. propane hose with a built-in regulator is included. CO Shield technology protects your family from the dangers of carbon monoxide. Our CO Shield sensor tests itself automatically and if operated in inappropriate locations, the generator will shut off automatically. with a 0.6 qt. oil capacity (included 10W-30) and a low oil shut-off sensor, this inverter operates at an ultra-quiet 64 dBA from 23 ft. Covered outlets include a 120-Volt 30 Amp RV (TT-30R), two 120-Volt 20 Amp household outlets (5-20R) and a 12-Volt DC automotive-style outlet with a dual USB adapter. Buy this EPA certified and CARB compliant generator with confidence - Champion Support and our nationwide network of service centers will back up your purchase with a 3-year limited warranty and FREE lifetime technical support.