The CT AutoClean is the magic behind your PLANEX that makes it virtually dust-free. Insane amounts of suction suck up nearly every speck of dust leaving your client with a big smile on their face when you're done at the end of the day. The CT AutoClean has an integrated filter cleaning mechanism that periodically knocks the dust free of the filter. This guarantees maximum air flow and prevents the filter from becoming caked with dust. The filter cleaning frequency is controlled by a dial and can be completely disabled. The CT AutoClean can be used as a regular dust extractor when run without the AutoClean enabled.