Compatible for 3i, F1 Deep cleaning: The bristles penetrate deep into the carpet fibers or floor crevices, bringing out the debris hidden in them, achieving a deep cleaning effect and ensuring that there are no dead ends in cleaning. Floor adaptation: It can adapt to a variety of floor materials, such as wooden floors, tiles, carpets, etc., and can work well on different surfaces by adjusting the softness and hardness of the bristles and the rotation force. Self-cleaning assistance: Some roller brushes are designed with self-cleaning function, through a special device, they can automatically clean up the debris on the bristles when the vacuum cleaner is running, reducing the frequency of manual cleaning. Replace the roller brush for better cleaning: The surface material and bristle design of the roller brush can effectively grab the dust, hair and all kinds of debris on the ground, and quickly roll the garbage into the vacuum cleaner through high-speed rotation to achieve better cleaning of the floor.