Cool Ventilation: this solar exhaust fan kit is equipped with a 25W monocrystalline silicon solar panel, with an efficiency of up to 20%, and a size of 14.2 x 13 inches; And adopts a 12.1 x 6.3 inches dual fan group design, which can increase the speed of indoor and outdoor air circulation, effectively reduce indoor temperature and humidity, remove odors, and keep the air fresh Weatherproof and Safe Design: our solar panel fan kit is well-made with a sturdy casing, and all accessories are treated with IP65 weatherproof, which is enough to resist the harsh outdoor environment and is durable; The dual fans are equipped with metal protective mesh, which can effectively prevent foreign objects from entering and eliminate animals risk of contact with the blades, thereby ensuring continued normal operation of the fan and preventing animal injury Solar Powered and USB Interface: our waterproof dual exhaust fans are powered by solar panel and have no built-in battery; When sunlight shines on the solar panel, the fan can rotate, which is safer, more energy-saving and cost-effective; It is also equipped with USB interface, you can connect an external power bank to make it work normally at night Portable and Easy to Install: our solar panel exhaust fan is lightweight and easy to carry, suitable for outdoor use; Comes with complete installation accessories, simple operation, does not take a lot of time to complete the installation, and comes with long enough wires for easy connection to solar panels Wide Application: our 12V solar panel fan can be installed wherever you need it, and is widely used in small greenhouses, chicken houses, duck houses, sheds, pet rooms, basements, RVs, window exhausts and other occasions to discharge hot indoor air and enhance air circulation to maintain a comfortable temperature level Feature: Packing list: You will receive 2 sets of solar panel dual fans, packed in boxes, each set contains 1 solar panel of 14.2 x 13 inches, 1 dual fan set of 12.1 x 6.3 inches and 1 set of mounting accessories, fan wind large but quiet in operation, it is a great helper for ventilation in confined spaces. Fan speed: This solar panel powered fan works well with solar panels and can use free solar energy to continuously improve air flow and keep the air fresh, but its speed will be affected by the intensity of sunlight. When the sunlight is weak, the fan speed will be slower, at this time you can use the USB interface to connect the power supply. Provide comfortable environment: Our solar fan for outside helps reduce indoor temperatures and maintain optimal indoor humidity levels, preventing the air from being stuffy or trapping harmful gases. They are ideal for providing a more comfortable environment for small animals, helping to improve their respiratory health, thereby reducing their risk of disease. Specifications: Main material: metal Color: as picture shown Size: Dual fan set: 12.1 x 6.3 inches Solar panel: 14.2 x 13 inches Package includes: 2 x Solar exhaust fan kit Warm notes: Manual measurement, there may be slight differences in size. Due to the screen display, the color of the item may differ slightly from the picture.