The Sportsman Gasoline 4,000W Portable Generator serves a wide variety of purposes. It has a fuel capacity of 3.6 gal and can run for as much as 10 hours on a 50 percent load. Only unleaded gasoline is needed to power this 4,000W generator. Its small size makes it ideal for taking on the go. Take this tool to power an RV while parked at a campsite. It is also useful for providing extra electricity during a power outage or another emergency situation at home. The Sportsman portable generator is a good choice for campers that run small TV sets, radios, stoves, grills and other small appliances. This unit will detect when the oil in the engine is low and will shut down automatically for added safety. An AVR automatic voltage regulator makes it more convenient to use. The unit is approved by the EPA to be safe for the environment.