Model WH5500 includes the Westinghouse, 357 cc, OHV engine that has been designed for power, durability and quiet operation; it comes with an oversized muffler and catalyst. All Westinghouse generators come with EZ start, color-coded starting controls and access to a friendly and knowledgeable customer service group that can be reached at 1-855-WH-HELP-1 (944-3571). This model can be assembled very quickly and is easy to operate with a simplified power control center and is backed by an industry leading 3-year limited warranty. Other items included are never-flat tires, high-leverage handles, tool kit, one liter bottle of oil and a funnel to get you started right out of the box.