Features: and high quality Easy to install: This replacement filter is specially designed for USB air coolers. No special tools required; installation takes approximately 2 minutes, providing a refreshed 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 improve air quality and maintain cleanliness of the air cooler. Replacement frequency: It is recommended to replace the filter every 2 to 3 months to maintain optimal performance and hygiene. Compatible with mini portable USB air coolers, offering quick and effective absorption of airborne 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 before ordering. 2. Due to differences in monitor displays, the actual color of the item may vary slightly from the images shown. Package includes: 1 x Air Cooler Filter