1Cooling and Ventilation: The solar panel fan can push out the hot air, effectively reducing the indoor temperature and keeping the air fresh. 2Green Energy: The mini portable solar panel fan effectively converts sunlight into electricity, has a long service life, and is green energy. 3Wide Application: Solar exhaust fan is perfect for pet house, chicken coops, treehouse, dog house, greenhouse, Rv, touring car, camping, etc. 43000r/min Maximum Fan Speed: The solar panel runs the fan fast in direct sunlight, when the sunlight is weak, the solar fan will work slower or stop working. 5Easy to Use: The cooling fan is powered by the solar panel, just connect the solar panel and the interface of the fan and put it in the sunlight.