The Black Knight has a 12 amp high efficiency Lamb motor. It uses Air-Way's air evacuator assembly (the 'cage' for the bag) and a HEPA disposable bag. I love the Wessel Werks Power Nozzle, just glides over the rugs. It's fun to see the florescent light bulb come on after about 20 seconds of running. The hose is 10 feet long and I love dusting with it and the "V" dusting brush. It's an amazing, quiet, powerful machine.