Feature: Fast 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. Humanized Design: Equipped with stainless steel proof net to prevent mosquitoes, 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. Specification: Item Type: RV Roof Vent Fan Material: ABS Working Voltage: DC12V Installation Hole Size: Approx. 280x280mm / 11.02x11.02in Dimensions of The Fan: Approx. 360x360x120mm / 14.17x14.17x4.72in Suitable for Installation Thickness: Approx. 25x60mm/0.98x2.36in Dual Mode: Air Intake or Air Outlet, One Key Switch Features: Equipped with stainless steel net, pure copper core motor, reliable and efficient, 10 blades, more stable operation, quieter, 2 way exhaust, 4 LED light bars, can also be used for lighting Application: Will exchange the air in your motorhome or caravan in minutes. It will blow away cooking fumes and unpleasant smells from the bathroom, allowing you to breathe fresh outdoor air. Breathe in natural, fresh outdoor air to make your living space more comfortable. Applicable: It can be used for large vehicles such as RVs, buses, yachts, etc. Package List: 1 x RV Roof Vent Fan4 x Screw Plug Note: The opening direction of the ventilating fan must be opposite to the direction of the front of the car. If it is not installed according to the method, in severe cases, the air flow may lift the ventilating fan cover when driving at high speed! Cause product damage! It does not belong to the product itself and refuses aftersale, and there is no reason to return the product!