2012 Max Air Ventilation for RV Roof Fan Roof Vent Reversible Exhaust Fan, extremely quiet continuous ventilation RV 12V Remote, with 14" semi-transparent UV-resistant cover

"Brushless motor - Five times longer lifespan than conventional brushed motors: Exclusive brushless motor solution working with extremely low noise. Strong interference suppression, reduces noise pollution to human body and provides a quiet and comfortable living space. High efficiency with low motor loss, maximum load current is 4a, saving the battery energy of your RV and environmentally friendly. Independent channel design ceiling fan function: Provides uniform permanent ventilation (when closed) and circulates air inside and outside your RV on rainy days. Ultra quiet operating fan blade and stop the lid at any angle: With patented curved surface and precise dynamic balance design, the fan blade reduces wind noise as much as possible and realizes 4 noise levels of 10 dB, 25 dB, 45 dB, 68 dB during operation. As for the position, the cover can be adjusted to any angle to meet your different daily needs, who wouldn't like that? Intelligent rain sensor and reversible ventilation: The lid closes automatically in rain to prevent water accumulation and leakage. Inhale or exhale, 4 adjustable speeds (3W/10W/20W/40W). Universal Size and Lifetime After-sales: Fits standard 14 x 14 inch roof vent, suggested opening size is 360*360mm, Recommended roof thickness: 37-85mm. High-powered with 12V voltage." Tipitopi