STAY COOL IN COMFORT OF YOUR MOTORHOME – The electric ventilation system provides powerful air conditioning for any motorhome or similar recreational vehicle, for 40 x 40 cm / 15.7 x 15.7 inch sliding roof openings and electrical connections, caravan thickness requirements: 25 mm – 55 mm. Fuse Protection: The RV fan has a slow melting 5A function, which can effectively prevent the zipper short circuit due to excessive current and extend the life of the fan. Remote control control: you can easily adjust the fan position, 12V two-way fan and switch and up and down settings. With the remote control, you can control your camper van. 10 SPEED REMOTE CONTROL: Closes the lid and shuts off the fan when it gets wet. Powered-lift lid opens and closes automatically. DURABILITY PERFORMANCE IN ANY SEASON: A ceiling fan fan can not only bring cool and freshness to your room during the hot summer months. It also helps to avoid excessive moisture and vapours when breathing, showering and cooking. When using the rain sensor, you need to open this setting first, and the rain sensor indicator will light up. LCD remote control, real-time monitoring of interior temperature, Two representations of Fahrenheit and Celsius. 2.12V two-way ventilation, ten gears adjustable, button panel design, remote control + manual control. European style, with independent fuse (free one replaceable fuse). With a large brush motor, the ventilation can be completed instantly (strong power). Electric ejection top cover (electric lifting top cover). Rain feeling setting (automatically close the top cover when it rains). Multi-blade design, increase the exhaust air volume. Equipped with 16 mounting screws, easy to install. The mosquito-proof window screencan be disassembled for easy cleaning. Five language installation instructions to solve installation troubles. Fuse: 5A Slow Melted. Maximum opening angle: 60 degrees. Remote control range: 20 meters. Roof opening size: 40 x 40cm. Roof thickness: 2.5-5.5cm. Cover:PC with Anti-UV. Insect net material:stainless steel Flynet. (1) Pay attention to the installation direction, the ventilation fan opening and closing direction is opposite to the driving direction. (2) The installation opening is 400400mm, the wall thickness is 25-55mm. (3) The outlet direction of the ventilating fan is at the switch position. (4) Weather-resistant glue is applied around the top and the installation opening position to fix and release water. (5) Please close the sunroof when driving.