The Wertheim Evolution MAX Stick Vacuum Cleaner has been carefully engineered and designed to provide superior performance and power. It arrives with both a hard floor and combination power head for effective dust, dirt and pet hair pickup on a variety of floor types, and offers a runtime of up to 100 minutes across two rechargeable batteries. This next-generation stick vacuum can be easily converted to a hand vacuum and features a dust sensor to control suction levels, six premium accessories for a top-to-bottom clean and ball bearing wheels on the power heads for a quieter cleaning experience.