L Class Automatic Filter Cleaning Dust Extractor (42.0 L) Automatic filter cleaning system to maximize filter efficiency and maintain suction power Washable HEPA Filter cartridge filter protects turbine by holding back fine dust and debris Power regulation and switch off delay in auto mode On-board outlet and automatic start feature enables dust extractor to be operated in conjunction with power tools Variable suction power enables operator to adjust the suction power to the application Air Flow sensor warning with LED indication Compact and lightweight poly-carbonate shell for ease of transport Low noise level (60 dBA suitable for use in sensitive environments including hospitals, schools, institutions and more!) 13' Anti-Static Suction Hose (Features Quick Connect Coupling) Heavy duty job-site casters for maximum maneuverability on site Interlocking case holder mounted on the machine