The Karcher Promise: Cleaner. Quicker. The most efficient dust extractor in the market. THE answer to cleaning large amounts of fine dust. Fully Automatic Filter Cleaning System: Patented Tact system automatically cleans the filter while vacuuming. Thanks to Tact, over 770 pounds of dust can be vacuumed before the filter must be manually cleaned. Eliminates time-consuming work disruptions for filter cleanings and prolongs the filter life by up to 3X. Onboard Power Outlet with Auto-Start for Power Tools: vacuum switches on only when the power tool is in operation. Compact Flat Pleated Filter: Resides completely outside the tank, thereby maximizing tank capacity. Remove/replace the filter without opening the tank, avoiding the usual mess created by filter cleanings. Certified HEPA-Ready: combine with the optional HEPA filter to use in medical, industrial and other demanding settings. Designed for both coarse and fine dust, as well as wet suction.