Often replace the filter to help make indoor air more fresh Side Brush:it not scratch the floor and furnitureUnique design, easy to collect the hair material, in use. Filter helps reduce household odors Keep your home clean by changing the filters frequently - once every month or two, depending your usage. Clean brushes keep your home robot operating at . Side brushes are easy to remove and replace as part of routine maintenance. Filters maintain cleaning performance while reducing infiltration of dust, pollen and other allergens into the air you breathe. For W10 W10 Pro Colour:As shown Material:plastic Package Contents: 1 x roller brush 4 x side brush 2 x hepa filter 2 x mop pads 1 x clean brsuh Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.