COMPLETE UNIT AX20 ACTIV’s patented new engine design ensures the ultimate cleaning experience with the ability to handle from sand & small debris to long, stringy debris. The AX20 ACTIV comes with cyclonic scrubbing brushes that remove algae and fine particles, as well as hard, stuck-on dirt which other cleaners may leave behind. AX20 ACTIV also features a new track guard, ensuring the cleaner climbs without traction loss and prevents track slipping. The maX-Drive Navigation 360° with dual drive assembly delivers efficient cleaning experience like nothing else.