As part of normal maintenance, it can be easily removed and replaced. It is recommended that you replace spare parts every 2 to 3 months depending on the frequency of use to maintain optimal performance. Helps clean the vacuum cleaner and promotes a healthier lifestyle. Captures 99.9% of fine dust particles, improving air quality and extending the vacuum cleaner's lifespan. Easy to install; no additional effort or time required. Filter name: Humidification filter Filter efficacy: Reduces impurities in water, calcium and magnesium ions, helping purify water quality Replacement cycle: 6–12 months Compatible models: For air purifier -2801FZ Color: Blue Material: Plastic Package Contents: 1 x Air Purifier Filter Note: The package includes only the items listed above; other products are not included. Light reflection and differences in display screens may cause slight variations between the color shown and the actual product. Measurement error allowance: ±1–3 cm.