The AUTOMATIC X is the world’s most technically advanced and uniquely easy-to-use vacuum cleaner! With two power head widths, the 12-inch X4 and 15-inch X5 feature truly automatic height adjustment, using an electronic controller that measures the resistance of the spinning brush roller against the floor, and then it signals 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 X also 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. SEBO’s NEW AUTOMATIC X4 Boost features TWO TRULY AUTOMATIC height settings that enable the user to choose between two levels of brush agitation! The default setting is perfect for most flooring types. But by activating the Boost Button, greater resistance against the spinning brush roller is allowed before height adjustments are made, which causes more aggressive brush action. For users who want truly automatic height adjustment, but also want to choose their level of brush aggressiveness, the X4 Boost is the solution!