Galvanized fan blades inside an impact-resistant polypropylene shell give this 480-watt unit its working life, and a protective outlet grille keeps curious fingers away from the moving parts. Output measures 900 cubic feet per minute at 1650 pascals of wind pressure, which brings a garden bouncer up to shape in minutes whether the job is a weekend rental or a back lawn birthday. Automatic over-heat and over-load protection let it run for hours at a school fair without supervision. The 12-foot power cord on 120 volts and 60 hertz places the unit away from foot traffic, and an IP24 rating covers splashes. At 9.7 pounds with an integrated handle and a 14 by 7.5 by 13.5 inch body, it carries in one hand. Two ground stakes and a 4-inch air outlet complete the setup.