Energy-efficient,and Efficient:The pure copper motor of this extractor ventilation fan ensures exceptional durability,energy efficiency,and high performance. Boosted Impeller Fan Blade for High-Speed:The specially designed boosted impeller fan blade of exhaust air blower maintains its shape even at high speeds, ensuring consistent and efficient airflow. Premium ABS Fire-resistant Material for Durability:Crafted from high-quality ABS fire-resistant material,this exhaust fan is built to withstand daily wear and tear. Design with Check Valve:Equipped with a check valve design.The check valve automatically opens and closes with the wind,unwanted from entering your living space. Energy-saving and:The inclusion of a solar panel in this fan allows for energy-saving and environmentally conscious usage.Harnessing the power of the sun,this fan reduces on traditional electrical sources,resulting in lower energy consumption and a smaller carbon footprint. Exhaust fan power:4.8W Solar panel