3800 PSI (pounds per square inch) 4.0 GPM (gallons per minute) Commercial Grade Honda GX390 OHV Engine, 390cc fuel efficient and easy starting. Offers unsurpassed quality, performance and reliability. Professional Grade Triplex Pump is designed for the toughest jobs and delivers maximum performance for daily use. Adjustable Pressure Regulation allows you to adjust the water pressure with the simple twist of a knob. 5 Pro-Style Quick Connect Spray Tips (0, 15, 25, 40 and low pressure) offer pre-set spray patterns for precise control and are designed for frequent use. Steel Reinforced 50 ft hose with quick connects is designed for durability and ease of use. The extra length allows for extended reach. Rugged dent-resistant steel frame and 12" never flat all terrain tires. Detergent injection system