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.Engine: Briggs and Stratton. Rated Watts LP: 7,000 kw.Rated Watts NG : 6,000 kw.Surge Watts LP: 10,500 kw.Surge Watts NG : 9,000 kw.Volts: 120/240. Phase: Single. Fuel Type: Liquid Propane, Natural Gas .Enclosure: Yes. Battery Required :Yes. Battery Included: Yes. Dimensions L x W x H : 30 1/2 x 22 1/2 x 32 1/2 in.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.