4" Ultra Quiet Bathroom Exhaust Fan With Humidity Sensor - Wall/Ceiling Mount Ventilation For Shower & Toilet ,Easy Installation

The fan blades are optimized to improve efficiency and reduce noise; It has low noise, large air volume, high efficiency and stable wind pressure; It is suitable for ventilation in factories, living rooms, office buildings, restaurants and entertainment venues; The casing and impeller surface are sprayed with advanced technology, with soft and bright colors that last forever; It is safer than traditional plastic fans.