1. Adjustable air volume: Easily control the airflow in your room with the adjustable airflow function of this ceiling air supply vent cover. 2. ABS Material: Made of durable ABS material, this air vent cover is built to last and withstand daily use for a long service life. 3. Quick and safe installation: This ventilation grille cover can be mounted quickly and securely to ensure it stays firmly in place. 4. Efficient exhaust and noise reduction: Designed for exhaust purposes, this ventilation grille cover effectively reduces noise and enhances air circulation, improving overall ventilation efficiency. 5. Decorative Design: Beyond its functional benefits, this air vent cover features an elegant design that adds a touch of style to your space. 6. Specifications: