Precision replacement filter set for Lydsto R1, R1A, G2 and compatible with VIOMI S9 Key benefits — why you need this filter Cleaner air and better pickup: Duallayer filtration captures large debris and finely traps dust, reducing particle leakage back into the room and improving overall cleaning performance. Maintains robot performance: Filter and HEPA dimensions match each model's dustbin and installation slots exactly, preventing airflow loss and keeping path planning and autorecharge functions working reliably. Lower maintenance and running cost: Washable prefilter and durable HEPA construction reduce replacement frequency and make upkeep simple. What it does (features and function) Precision fit: Filter and HEPA cartridge dimensions match the dustbin structure of Lydsto R1, R1A, G2 and VIOMI S9, including installation slots for easy, secure installation. Duallayer synergistic filtration: Prefilter: density PET fiber captures hair, larger dust and debris before they reach the HEPA core. H12grade HEPA core: Meltblown, deformationresistant media precisely traps fine dust and small particles to minimize leakage. Optimized airflow: Component airflow capacity is matched to the robot vacuum motor power to eliminate unnecessary airflow resistance, preserving suction efficiency and ensuring uninterrupted navigation and autorecharge behavior. Durable materials: density PET prefilter is washable and reusable after drying. HEPA core uses a deformationresistant meltblown structure with dustholding capacity for consistent performance. Practical details customers care about Compatibility: Lydsto R1, R1A, G2 and compatible with VIOMI S9. Material: Washable PET fiber prefilter; meltblown H12grade HEPA core. Installation: Designed to align with modelspecific dustbin shape and installation slots for quick, correct placement. Use scenarios — how this filter helps in real life Homes with pets: Captures pet hair and dander before it reaches the HEPA core, reducing clogs and maintaining suction when cleaning furprone areas. Allergysensitive households: H12grade HEPA core traps fine dust and allergens that ordinary filters miss, helping lower airborne particles during and after vacuuming. Multiroom automatic cleaning: Optimized airflow prevents performance drops during long cleaning cycles, so the robot can complete scheduled multiroom runs and to charge without navigation interruptions. Maintenance tips Rinse the PET prefilter with water, let it dry completely before reinstalling. Inspect the HEPA core for heavy soiling or damage; if performance declines. Regularly check the dustbin and filter seating to ensure proper alignment with the installation slots. What makes this product stand out Exactfit design for listed models guarantees correct airflow and function. Combination of washable prefilter and robust H12 meltblown HEPA reduces waste and replacement frequency. Engineered airflow compatibility protects robot navigation and autorecharge features while maintaining suction efficiency. Compatibility recap Lydsto R1, R1A, G2 Compatible with VIOMI S9 Simple, reliable replacement to keep your robot vacuum running efficiently and your home cleaner.