A. The product uses materials of good quality, is well-made, durable, and has good compatibility with the device. B. Cleaning accessories can help keep your household robot in a good state. The components of the accessories are easy to disassemble and replace for daily maintenance. They can also reduce the infiltration of dust, pollen, and other allergens into the air you breathe. C. To achieve better cleaning and filtering effects, the cleaning accessories should be replaced every 2 - 3 months according to the frequency of use. D. The HEPA filter can improve air quality to a certain extent, with a particulate filtration efficiency of up to 99.97%. It helps to remove household dust, pet dander, etc. E. The pre - filter can help reduce unpleasant odors generated by pets, smoke, cooking fumes, and various household products and chemicals. F. Color: As shown in the picture. G. Material: Plastic. H. Package contents: 1 filter, 1 cleaning brush. Only the above package contents are included, and other products are not included. I. Note: Light reflection and different displays may cause slight differences between the color of the items in the picture and the actual objects. The allowable measurement error is +/- 1 - 3 cm.