The Dual-Mode Generator allows you the flexibility to get immediate backup power now (when you need it most)… and permanently installed backup power later — all in one compact unit. U.S.A.Engine Briggs and Stratton Rated Watts LP (kW) 7,000 Rated Watts NG (kW) 6,000 Surge Watts LP (kW) 10,500 Surge Watts NG (kW) 9,000 Volts 120/240 Phase Single Fuel Type Liquid Propane, Natural Gas Enclosure Yes Battery Required Yes Dimensions L x W x H (in.) 30 1/2 x 22 1/2 x 32 1/2 Additional Product Specs * Includes a propane quick-connect kit to get you back up and running immediately with the ability to upgrade to permanent backup power when convenient for you * Features engineered air passages, a LoTone muffler and acoustic foam dampners for 50% quieter operation than most portable generators