Usage Tips:The filter can absorb 99.97% of particles, dust and allergens up to 0.3 Micrometres to remove house dust, pet dander, mould spores and pollen.perfect for allergy sufferers and pet owners.The contents of the accessory can be easily removed and replaced as part of routine maintenance.Cleaning accessories keep your robot clean while reducing the accumulation of dust and other allergens in the air you breathe.To achieve the best cleaning filter effect, the cleaning accessories should be replaced every 2-3 months, depending on the frequency of use.Colour:Photo ColorMaterial:plasticPackage Contents:3 x filtersOnly the above package content, other products are not included.Note: Light shooting 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. ,