1Fast Air Change: Ceiling ventilation fan provides air inlet and outlet function. Black ventilation fan cover and clear fan blades allow light to enter the van's cabin. Bring your Rv into fresh air. A quick air exchange in your vehicle. 2Humanized Design: Equipped with stainless steel insect proof net to prevent mosquitoes, insects, sand and gravel from entering the interior of the Rv, the motor is made of pure copper core, reliable and efficient, low noise motor, low decibel operation and ventilation, allowing you to sleep peacefully. 3Suitable Installation Location: Suitable for installation near the kitchen or bathroom, etc., to eliminate the smoke in the kitchen, eliminate the unpleasant smell in the bathroom, let you breathe fresh and natural air, and make your living space more comfortable. 4Wide Application: Exhaust fan can be used for installation and use of large vehicles such as RVs, buses, yachts, etc. The dual mode of air change or air outlet can be switch with one button, no extra operation is required, and it is convenient to use. 5High Brightness LED: The shell has 4 super bright LED strips, which can also be used as lighting, which is very suitable for installation in the dark bathroom corridor warehouse or any location. 6 Materials and Low Noise: The ventilation fans are made of engineering grade Abs plastic materials, which are anti ultraviolet, anti yellowing, waterproof, soundproof, and not easy to age.