The AUTOMATIC X7 is the world's most technically advanced and uniquely easy to use vacuum cleaner! It features truly automatic height adjustment using and electronic controller that measures the resistance of the spinning brush roller against the floor surface to signal up or down adjustments, which ensures optimal performance on both carpets and hard floors. The user is also alerted to clogs, a worn brush, or a full bag and the vacuum automatically shuts off when brush obstructions occur to protect the motor and belts from damage. The AUTOMATIC X7 has an instant use cleaning wand and suction hose, a lifetime belt warranty, tool free brush roller removal, a 40 foot power cord and three on board attachments. Automatic X7 Premium Graphite Model 91543AM