A. Regularly replacing the filter can help improve indoor air quality. B. Side brush: It is less likely to scratch the floor and furniture. With a unique design, it can easily collect hair and is relatively durable. C. The filter can help reduce indoor odors. D. Replace the filter every 1 - 2 months based on usage to maintain home cleanliness. E. Color: Black + Blue. F. Material: Plastic. G. Package contents: - 2 main brushes - 1 main brush cover - 6 HEPA filters - 6 side brushes - 4 cleaning cloths - 1 cleaning tool H. Only the items mentioned above are in the package, and other items are not included. I. Note: Light and different monitors may cause slight color differences between the item and the actual product. The allowable size error is ±1 - 3 cm.