The Flex Power Tools VCE 33 M AC Vacuum Cleaner 110V is fitted with a high-performance turbine that ensures both a high suction capacity and a high vacuum rate. Continuous automatic flat filter cleaning ensures no loss of suction. The flat-fold filter has a Teflon coating/nanocoating that allows optimum use of the tank volume. Flow sensor technology monitors the flow rate and emits a visual and audible signal to indicate any drop below the statutory minimum value of 20m/s. It is also suitable for wet vacuuming and fitted with electronic liquid level control to prevent over filling. There is a separate motor air cooling duct fitted with coarse dirt filter that protects the turbine against the ingress of ambient air and thereby extends the service life. Soft start stops any voltage peaks at the start and the run-on feature (15 sec. overrun) empties any remaining dust in the vacuum hose. The suction diameter selector switch adjusts the flow rate to the corresponding task. It is simple a