Universal joint, clean in all directions. 2 side brushes clean along walls and in corners. Clean all types of floors. The self-adjustable brushes can adapt to uneven floors. With the Li-ion battery you have maximum power, long lifetime, ready to use at any time, no self-discharge, rechargeable at any time, and cordless cleaning with no limits. Charging time 100% in 90 minutes. Handle height of 43.3 max.