High-efficiency and high-efficiency HEPA filter - Usually, we need to replace the HEPA filter every 2 to 3 months, filter paper is made of PM2.5 to prevent secondary pollution, effectively protect the motor from inhaling tiny dust and extend the service life, thus extending the service life of the . Soft rubber debris extractor without tangles - exclusive roller, very soft wear-resistant rubber, special texture, completely solves the tangle problems, higher garbage capture rate, serrated tread on the roller brush, strongly decomposes debris, breaks hair, removes 99% of hair. Compared with the previous generation, the 800 and 900 series have 51% higher performance and efficiency. SIDE BRUSH - Symmetrical brushing, strong anti-tangle structure, with side brush suction, golden inclined angle of rubber arms, effectively scrub the garbage into the brush Main brush. The side brush will not scratch the floor and furniture, which greatly guarantees the safety and cleaning effect during use.