The Nature's Generator Elite Platinum System - WE System is a user-friendly unit that stores electrical energy in its internal battery and uses state-of-the-art electronics that convert 12-Volt power to 120-Volt everyday household electricity. Nature's Generator does not require gas to run and can be used indoors as it does not emit any toxic fumes like standard gas generators. It is also whisper quiet when in use. When you order, you'll get the Nature's Generator, a Heavy-Duty Cart to ensure ease of movement and transportation of the Nature's Generator and a 1-year product warranty.