Features: 1. Strong wind, low noise, effective and quiet ventilation, quickly removes moisture and odors. Dust-proof filter, two-way large-displacement ventilation. 2. Built-in copper motor with thermal protection, capable of continuous operation without maintenance. 3. Space-saving top mounting design, easy to install without complicated tools. 4. Frame and blade made of ABS material with a white painted finish, waterproof, dustproof, and energy-saving. 5. Suitable for use in kitchens and bathrooms; ideal for marine vessels, yachts, RVs, trailers, and motorhomes. Specification: Item Type: RV Fan Material: ABS Rated Voltage: 12V Hole Diameter: Approx. 118mm/4.6in Speed: 3000 rpm Air Volume: 80 CFM Installation Thickness: Approx. 80-160mm/3.1-6.3in (adjustable) Installation Method: Open hole, connect at both ends for installation Usage: Install, secure, and start operation Wiring: Positive pole of the fan connected to the middle terminal of the switch. Negative pole of the fan connected to the negative pole of the power supply. Positive pole of the power supply connected to the end terminals of the switch. Package List: 1 x Fan 1 x Air Outlet 5 x Screws 1 x Manual