Equipped with Hoover's patented WindTunnel technology, this bagless upright vacuum cleaner effectively lifts and traps dirt and debris, so it ends up in the cleaner not scattered back out onto the floor. With red and green lights, its embedded DirtFinder system indicates areas that need more cleaning attention. The green "clean" light remains on while vacuuming except when the detector senses a larger amount of dirt; then the red "dirty" light will illuminate to suggest additional vacuuming in the area until the light changes back to green. The unit's motorized brushroll picks up even deep-down dirt in the thickest of carpeting, while its brushroll shut-off switch makes it possible to transition from carpets to bare-floor surfaces with ease. For added convenience, the vacuum cleaner comes equipped with a flexible hose and a handheld pet-hair tool with rotating brushes that effectively lifts and removes stubborn pet hair and dirt from upholstery and carpeted stairs. Other highlights include a self-propelled design for nearly effortless use and smooth maneuverability, a HEPA filter that traps up to 99.97-percent of dust and pollens down to 0.3 microns in size, an easy-empty dirt cup, and a comfortable handle with thumb-activated controls. The vacuum cleaner measures approximately 11 by 16 by 43 inches and carries a one-year limited warranty.