Features: High quality Easy to install: This replacement filter is specially designed for USB air coolers. No special tools are required, and installation takes approximately 2 minutes, helping to maintain efficient cooling performance. High-quality design: When your air cooler performance decreases, simply replace the filter element to restore functionality, promoting fresh and healthier airflow for your household. Function: Effectively captures airborne impurities and dust, helping to improve air quality and keep the air cooler unit clean. Replacement frequency: It is recommended to replace the filter every 2–3 months to maintain optimal performance and reduce the buildup of contaminants. Compatibility: Suitable for mini portable USB air coolers, providing quick and effective filtration. Specifications: Material: Plastic + Paper Weight: 225g Size: 4.72 x 4.72 x 4.53 inches Note: 1. Please allow 1–2 cm variation due to manual measurement. Ensure you are comfortable with this range before ordering. 2. Due to differences in monitor displays, the actual product color may vary slightly from the images shown. Package includes: 1 x Air Cooler Filter