It's dust-free! A multistage dust control system makes it ideal wherever clean-air environments are essential. The 2500B by Tornado is housed in an all steel frame wrapped in a smartly designed durable rotationally molded housing. Safety swtiches prevent operation of the machine when the housing is removed or the pad holder is raised. Twin clean air filters allow for virtually dust free burnishing perfect for healthcare and educational facilities and retail store operations where air quality is paramount. Tornado has recently developed an exciting self propelled model. The unit comes standard with our trademark state of the art digital controls for longer run times and full forward and reverse capability. Infinitely variable speed control can be customized for maximum productivity and effortless user comfort. Our unit is quiet and turns on a dime. Try it and you will be sold!