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. 12 Amps of cleaning power Patented WindTunnel Technology Self-Propelled Technology Embedded Dirt Finder Fingertip Power Control and On/Off Brushroll plus on-board tools Warranty: 3 year limited