Solar Power: The exhaust fan makes use of the solar panel since the energy source, equipped with a typical USB voltage regulator to maintain the output, it may be used outdoors anytime, anywhere, useful and fast. High conversion efficiency: The efficiency of single crystal photo voltaic cells is as much as 20%. Outdoor solar panels can effectively convert daylight into electricity. Say see you later to noisy exhaust fans! Our brushless exhaust fan elements excessive and whisper-quiet, it guaranteeing your peaceful environment is maintained. Made of high-grade monocrystalline solar cells with 22% conversion efficiency. High-quality materials, and a sturdy structure, makes it last as much as 20 years. Wide differ of applications: Suitable for kitchens, greenhouses, puppy houses, chicken houses, tree homes and RV, etc., protecting comfortable temperature levels. Color: Black Material: plastic Package Contents: 1 x Solar panel 2 x Exhaust fan