[Exquisite and Delicate Kit] 100% Compatible with Robotics - N9+ Robot Vacuum Cleaner, N9+ Plus Robot Vacuum Cleaner [EASY TO REPLACE] As part of normal maintenance, it is very easy to remove and replace N9+ parts. We suggest replacing N9+ accessories every 2-3 months to keep the machine running at peak performance, depending on the frequency of use [Main Brush and Side Brush] The main brush made of high-quality TPU strip and thicker bristles easily picks up debris, while maintaining a low noise level. The unique side brush can clean different floor surfaces, completely removing dirt even in the deepest corners. [Hepa Filter] The HEPA filter is made of high-strength environmentally friendly materials, which can block most dust down to 0.3 micrometers. The filter can maintain the cleaning performance of the sweeper, while reducing the penetration of dust, pollen and other allergens into the air you breathe [HIGHLY EFFICIENT TECHNOLOGY] - Unique multi-surface rubber brushes do not get