Features: 1.Unique Design: The ventilation fan has low running noise, with large exhaust volume, fast ventilation, ensure quiet operation and longer service life. 2.Waterproof 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. 3.Filter 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. 4.Two 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. 5.Material: Made of yellow resistant materials, which are strong and durable, with the characteristics of yellowing resistance, long service life, firmness and durability. Specification: Item Type: RV Ventilation Fan Material: Engineering grade yellowing resistant material Size: Approx. 480x185mm/18.89x7.28in Function: Two way ventilation Feature: Insect repellent filter, strong wind, low noise fan