Solar power -- The exhaust fan is powered by solar panels and is equipped with a standard USB regulator to maintain output. It can be used anytime and anywhere outdoors, which is convenient and fast.High conversion efficiency -- The efficiency of single crystal solar cells is as high as 20%. Outdoor solar panels can effectively convert sunlight into electricity.Waterproof -- Solar panel adopt epoxy resin surface laminated, waterproof can adapt to the harsh outdoor environment, improve durability.Eliminate odor -- This portable exhaust fan can effectively help you maintain the flow of indoor air, keeping the air clean can help you eliminate the smell of pets, tobacco, etc.Wide range of applications -- Suitable for kitchen, greenhouses, pet houses, chicken hou.