The side brushes are perfectly matched and the installation method is the same as the parts, which is easy to install, easy to use. The mop cloth has strong and long-lasting cleaning power, which can easily respond to stains such as footprints on the floor, juice residue, and oil stains. HEPA filter is made of high-strength environmental-friendly materials, which can block most of dust down to 0.3 micrometer. 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 greatly reduce suction power. Depending on the vacuuming frequency and 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 garbage. With the anti cleaning design, it is clean, less maintenance and more worry free. Applicable Models: For 4090 For 4490 For 4690 For 5090 For