【Double-sided Fan Blade Patent】: Our bounce house blower are designed with double-sided fan blade, which will greatly increase the wind speed and enhance the efficiency of inflation. Adopts premium metal impellers and built-in bearing, both of which reduce noise greatly during operation. 【The Most Important- safety】: The air blower have passed the UL and ETL certified, the shell is made of ABS material, safe and durable. And there has a clear cover on the switch, which is safe enough for you to turn on/off in case it gets wet. The heat dissipation is also very powerful, long working hours will not overheat. 【550W High Speed Blower】: With 0.74 horsepower, strong and efficient 550 watts motor, 4.3" air outlet diameter, quickly filling and greatly air flowing. 2800 r/min and 340 Cubic Feet Per Minute air volume flow can fill the inflatable without effort. 60HZ frequency allows you to reduce the intrusion of noise. 【Widely Range of Usage】: The fan blower comes with 2m/6.6ft long power cable, easy to inflate in different locations. Widely use indoors or outdoors, suitable for bounce houses, water slides, obstacle courses, paint booth air sofas, and other suitable inflatable bouncers. 【Simple Operation & Warranty】: High quality fan blower with boosting capacity up to 1980 Pa. Anti-slip handle can easily pick up and put down, connect the inflatable items and press the switch to inflate. If you have any questions or dissatisfaction with our products, please feel free to contact us and we will reply you within 24 hours. Bounce House Blower, 550W/0.73HP Commercial Air Blower with Double-Sided Fan Blade Design, Strong Wind and Great Heat Dissipation Properties for Bouncy Castle, Jump Slides, Arch, Inflatables