The side brushes are perfectly matched and the installation method is the same as that of the parts, which is easy to install, easy to use. The mop has powerful cleaning power and , which can easily respond to various stains such as footprints on the floor, juice residue and stains. The HEPA filter is made of high-strength environmentally friendly materials, which can block most dust down to 0.3 micrometers. The filter can maintain the cleaning performance of the sweeper, while reducing the penetration of dust, pollen and other allergens into the air you breathe. Replacement Filter: A dirty filter will significantly reduce suction power. Depending on the vacuuming frequency and the amount of dirt cleaned, for best performance, change the filter at least every 3 to 6 months. Strong suction and sweeping of fine dust, hair, debris and other daily ground waste. With the anti-tangle cleaning cloth, it is clean, less maintenance and more worry-free. Applicable models: For 4090 For 4490 For