What are the core features of double-head brushes and their applicable scope?

Double-head brushes add one brush head on the basis of single-head brushes, doubling the cleaning efficiency, with stable cleaning and one-hand operation available. They are suitable for power stations of 500-6000 square meters, with a cleaning efficiency of about 350 ㎡/h and water consumption of about 0.4L/㎡, and have better effect on stubborn stains than roller brushes.