1Unique Design: The ventilation fan has low running noise, with large exhaust volume, fast ventilation, ensure quiet operation and longer service life. 2Waterproof Grille: In the rainy day or daily car wash, the rain will flow down the wall of the car, and the grille tilt design prevents the rain from flowing in. 3Filter Net: Built in filter net which can effectively isolate garbage in the air, and prevent mosquitoes from entering, but will not affect the ventilation effect. 4Two Way Ventilation: Built in three fans, with two way cooling, which can quickly take away heat, blow in fresh air to ensure air circulation in the car with safe operation. 5Material: Made of yellow resistant materials, which are strong and durable, with the characteristics of yellowing resistance, long service life, firmness and durability.