Features: High-efficiency adsorption: Utilises premium activated charcoal to effectively eliminate odours and harmful gas from the air, delivering a freshness and healthy indoor environment. Multiple stage filtration: Incorporates a HEPA filter layer capturing minuted particulates, enhancing purification performances and ensuring air quality meets standards. Long-lasting Performances:for durability, it maintains effective filtration over extended periods, reducing replacement frequency and saving user costs. High Compatibility: Specifically engineered for S1/S1 models, it fits perfectly and installs effortlessly without additional tools or complex procedures. Low noise design: The noise is extremely low during operating, which does not affect daily life and work, allowing users to enjoy freshed air in a quiet environment. Specifications: Component:activated charcoal and ABS Size About 77.5x77.5x35.5mm/3.05z3.05z1.39in Wide applicability: for S1/S1 models Package Includes: 1 set Air purification filter note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.