Dual Fuel: Operate your 4500-watt portable generator right out of the box on either gasoline or propane, plus features CO Shield carbon monoxide auto shutoff system Quiet Technology and Extended Run Time: 61 dBA is great for RVs, tailgating, or camping with 4500 starting watts, 3500 running watts and up to 14 hours run time on gasoline, and 3150 running watts and up to 21 hours on propane Parallel Ready: The optional parallel kit (sold separately) enables this inverter to connect with another Champion inverter to increase your power output Intelligauge with Power Meter: Monitor voltage, frequency and operating hours with ease, plus the EZ Start Dial simplifies startup Champion Support: Includes 3-year limited warranty with FREE lifetime technical support from dedicated experts