With patented technology wind tunnel, this bagged upright vacuum delivers powerful, deep and washing performance. Self-propelled unit offers nearly effortless maneuverability in forward and backward, while three separate channels of air and trap dirt and prevent it from scattering in the carpet, so dirt ends up not in the cleaner on the ground. With red and green lights, the embedded system DirtFinder indicates areas that need more attention in cleaning May. The green light "clean", while the vacuum remains, except when the detector senses a greater amount of dust, then the red "sale" is lit to suggest additional items in the area until the light changes to green. The unit has also