Exhaust Fan: 0.7 Sones,141 CFM 110V 45W. This exhaust fan operates at 0.7 sones and an airflow rate of 141 CFM, making it ideal for spaces up to 141 square feet. It operates very quietly, so you can enjoy a peaceful environment in your space. Easy to Install: 11.8 x 11.8 inches(L x W), Mounting Hole Size: 10.8 x 10.8 inches(L x W), Duct Diameter: Ø4.0 inches.Please confirm the size before making a purchase. The product can be easily fixed to the ceiling with screws, providing a sturdy installation. Simple Wiring: The fan function has three wires, according to the color Brown: L, Blue: N, Yellow: ground wire. Energy efficient: This fan is designed to use less energy than traditional exhaust fans, which helps you save on your utility bills. Trusted Quality: We stand behind the quality and construction of each and every one of our products. Our exhaust fan is produced and certified to meet regional, national, and international industry standards, so you can trust in its reliability and longevity. Heat Protection Settings: Heat protection settings are included in our product, with a built-in device that automatically stops running when it reaches a certain temperature. This prevents damage to the equipment from prolonged high-temperature operation and eliminates the risk of fire. If you receive products that are not what you ordered, please take a photo and contact us immediately. We will provide you with a proper solution. Our bathroom exhaust ventilation fan provides exceptional air-circulation performance and removes moisture and humidity, creating a healthy environment. With quiet operation and energy efficiency, this fan will keep your bathroom fresh and comfortable all year round. Installation is easy with the included hardware, and the sleek modern design will complement any bathroom. Don't let poor air quality affect your daily routine, order this powerful ventilation fan today.