Karcher's NT 45/1 Tact dust extractor provides powerful, convenient cleaning performance. The patented Tact filter cleaning technology delivers unrivalled filtration for maximum productivity. With an automated reverse air flow, Tact sends powerful bursts of air through the filter to keep a user on the job with continuous use. No more stopping for a clogged filter! Thanks to Tact, over 770 pounds of dust can be vacuumed before the filter must be manually cleaned. A top mounted filter location, serperate from the tank, allows users to pick up wet or dry materials without changing or removing the filter, as well as provides clean and hassle free filter changes. Durable construction for years of use. German engineered. 100% quality tested.