Electrostatic adsorption: The filter uses the electrostatic electret process to generate a longlasting electrostatic force. It actively attracts dust in the air, and the filtration effect remains stable even when the air conditioner operates at low wind speeds. Washable and reusable: The filter supports direct water washing. After drying, performance remains unchanged and it can be reused 510 times. This saves about 70% of replacement cost compared with disposable filters and reduces waste. Secondmounted design: The filter is fixed with snaps, magnets, or velcro. It can be installed by hand when the air conditioner panel is opened, without a screwdriver, with simple steps. Low wind resistance: Designed to minimize wind resistance while maintaining filtration efficiency. It prevents the air outlet from becoming restricted, so cooling and heating performance and overall comfort are not compromised. Use scenarios: Home use in living rooms or bedrooms: improves air quality by capturing dust, pollen, and pet dander without affecting cooling efficiency. Office or classroom environments: easy to install and reuse, reducing ongoing filter costs and waste while maintaining air comfort. Seasonal or rental properties: reusable filtration reduces replacement frequency and environmental impact, suitable for units that require periodic maintenance.