Sweeping & Dust Collection: The fast rotation sucks the garbage into the suction port, and in combination with the suction force, completes the closed loop of "sweep - vacuum", improving cleaning efficiency. Hair Anti-Tangle: Adopts spiral flow guide and tapered structure to reduce pet hair entanglement with long hair. SMART MAIN BRUSH LIFTING - Lifts up when carpets, thresholds or liquids are found, avoiding getting wet, tangled and secondary pollution, and improving obstacle crossing and scene adaptation capabilities. Quiet & Noise Reducing Operation - Soft rubber bottom contact, precise dynamic balance and low-resistance structure design reduce operating noise and improve user experience. Replacement Main Brush Compatible with Eureka J15 Max Ultra Robot Vacuum Cleaner and to keep floors clean