Features: and high quality Easy to install: This replacement filter is specially designed for USB air coolers. No special tools required; installation takes about 2 minutes, providing a fresh and efficient cooling experience. High-quality performance: When your air cooler is not functioning optimally, simply replace the filter element to restore performance. Helps deliver cleaner air and supports a healthier environment. Function: Effectively captures airborne impurities and dust, helping to improve air quality and maintain cleaner operation of the air cooler. Replacement frequency: Replace every 2–3 months to maintain optimal performance and reduce buildup of contaminants. Compatible with mini portable USB air coolers, offering quick and effective absorption of particles. 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