Features: Equipped with intelligent humidity sensors, this 4 inch bathroom exhaust fan automatically activates when room moisture reaches preset levels, effectively eliminating odors and stop mold growth for healthier indoor air quality. Featuring a quiet ball bearing motor (<34 ) and strong plastic housing with IPX4 waterproof rating, this ventilation fan ensures stable performances in humid environments while blending seamlessly into modern decor. Ideal for homeowners, renters, and property managers seeking energy efficient ventilation solution to maintain air quality in moisture prone spaces like bathrooms, kitchens, and laundry rooms. Perfectly suited for wall mounted installation in bathrooms where steam accumulates during showers, kitchens exposed to cooking fumes, or laundry areas requiring consistent humidity control. Its integrated shutter stop intrusion and blocks external cold/moist air infiltration, making this bathroom ventilation fan a strong , low maintenance upgrade for any residential or commercial space. Specifications: Product model: -10F rate power: 15W Product name: Window ventilation fan Input electric: 220V Product color: pearl white Product size: about 150x150x95mm/5.91x5.91x3.74inch Package Includes: 1 set Exhaust Fan note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.