Efficient Solars Power Supply: Equipped with monocrystalline silicons solars panels for excellent photoelectric conversion efficiency, providing auto sufficient power without additional electricity costs Easy Installation & Versatile Use: Simple setup requires without professional tool, while durability materials and quiet operations make it suitable for garages, greenhouses, and more Waterproof & Weather Resistant: Made with good waterproof materials for stable in various weather conditions, ideal for outdoor and humid environments Switches Control: Includes an easy to use switches for adjusting fan operations as needed, enhancing flexibility and user convenience Double 9 Fan Design: Features a unique double 9 structure for powerful airflows, effectively ventilating chicken coops, pet houses, and storage spaces to maintain freshness air, Manufacturer: Whoasyst