BOSCH Random Orbit Sanders all have a built-in powerful dust extractor. It feeds the dust directly through the sanding sheet and sanding plate into the BOSCH Micro-Filter System, into which a ribbed filter is integrated. It prevents dust flying into your eyes and prevents you breathing dust in. In addition to this, you also have a clear view of the sanding surface and your sanding sheets have a longer service life. The filter capacity of the ribbed filter is 30 percent greater than conventional paper dust bags. Neither the box nor the filter are wearing parts. Buying replacement dust bags is therefore a thing of the past. You just have to empty the dust box from time to time. You can even  reuse the collected wood dust.  You can also connect a BOSCH All-Purpose Vacuum or a household vacuum cleaner instead of the BOSCH Micro-Filter System. You then require an appropriate adapter and connector.