Sebo G4The sturdy ESSENTIAL G is a powerful, technically advanced, upright vacuum cleaner that will provide years of reliable use! It has four level, manual brush height adjustment and comes in two power head widths: the 12 inch G4 and the 15 inch G5. They clean carpets and hard floors and have excellent pet hair removal. The G series also features an electronic controller that acts as a brain, alerting the user to a worn brush, or when brush height is set