Powerful brushless motor that provides suction for up to 4 workstations. Digital speed control with improved control and consistency to ensure long motor life and accurate power for a wide variety of applications. Automatic shaker motor self-cleans the HEPA filter cartridge every 4 hours of operating use, ensuring superior airflow. Particularly well-suited to green-state finishing and designed for easy maintenance. Part of the StoneVac family of dust collectors for die stone, microsandblasting media, porcelain, precious metals, and any other dry-particulate materials. All units are assembled by hand in the USA. 1-year warranty on dust-collector unit and 6-month warranty on motor.