The filter keeps the robot clean while reducing the penetration of dust, pollen and other into the air you breathe. new, high-quality materials, well made, , and high matching with the equipment. As part of routine maintenance, accessories are easy to disassemble and replace. Clean brushes keep your home robot at its best. In order to achieve the best cleaning and filtering effect, the filter should be replaced every 2-3 months according to the use frequency.