The DuroStar DS4000S 4,000 Watt Generator is designed by the professional, for the professional. It features a Fully Loaded Power Panel that is the main control center for the Generator. The Power Panel also has the Engine Shutoff switch, Volt Meter, and Circuit Breakers. These units are EPA approved for safe use in U.S. National Parks and mandated Jobsites. The Powerful 7 HP Durostar Engine is Air Cooled and can withstand use and abuse. This Generator has everything a Great Generator needs, but at a price that everybody wants.