DUAL FUEL: Operate your 2500-watt portable generator right out of the box on either gasoline or propane, plus at only 39 pounds, this inverter is one of the lightest 2500-watt inverters in the industry QUIET OPERATION: With an ultra-quiet 53 dBA from 23 feet, enjoy 2500 starting watts, 1850 running watts and up to 11.5 hours run time on gasoline, and 1665 running watts and up to 34 hours on propane PARALLEL READY: The optional, sold-separately clip-on parallel kit enables this inverter to connect with another 2500-watt Champion inverter to double your output power. GFCI Outlets : No CLEAN POWER: Includes two covered 120V 20A household outlets with clean electricity (less than 3% THD), a 12V automotive-style outlet, plus a handy dual port USB adapter CHAMPION SUPPORT: Includes 3-year limited warranty with FREE lifetime technical support from dedicated experts