Processed with waterproof coating to rainwater intrusion, ensuring in both indoor and outdoor environments Suitable for small chicken coops, greenhouses, sheds, and pet houses to keep the air freshs by pushing out hot air and bringing in cold air : Place the solar panel in a place that can receive sunlight, install a fan, and connecting it for use None Wiring usage is flexible Operate: When sun shines at the solar panel, connecting the interfaces and the fan can start When the sunlight is insufficient, the fan will work slowly or even stop working Features a 6inch double fan for increased exhaust efficiency and better heat dissipation, lowering indoor temperature and improving ventilation