The Greenwood CV2.1 Unity White Ultra Low Energy dMEV Fan is a 4-inch round electric extractor fan made of plastic, designed for any room in your home. With a smart home compatibility of Universal and an energy efficiency rating of A, this fan is both convenient and environmentally friendly. Its compact size and lightweight construction make it easy to install, while the four blades and switch control style ensure efficient and quiet operation. Perfect for improving air quality and circulation in your living space.