12V DC Rv Silent Roof Fan Portable Fan Removable Bed Car Mute Two-way Exhaust Fan Car Sunroof Row Radiator Cooling For Caravan ,Super Quiet & Efficient

Both a fan and a ventilation fan Four-speed speed regulation Delay off,LED display,Two-way panel Control panel for easily monitoring, balanced cooling performance and silent operation. Manually reverse airflow direction design, allowing push hot air out from inside and draw in fresh air from outside.