Cyclone dust box, black, with click-lock. Thanks to the cyclone action, coarse and fine dust are separated. This means the vacuum cleaner's dust bag or canister needs to be replaced or emptied approximately 80% less often. About 90% of the vacuum cleaner's suction power is maintained, and the suction power remains more consistent because the filter fills up less quickly. The transparent dust box is easy and quick to empty and has a capacity of 400 ml. Documents User Manual