[Easy To Install And Use]: The back of the 15 watt solar panel has pre drilled holes, which can be designed and installed by oneself, just facing the sunlight directly. The solar exhaust fan is equipped with a separate switch, which can manually control the ventilation fan on/off, making it practical and convenient. [Efficient And -Saving Solar Exhaust Fan]: 15W solar greenhouse panel, maximizing the capture of solar , providing efficient electricity directly from sunlight, helping you save electricity bills throughout the year!And provide a service life of more than 10 years. [High Quality Solar Fan For Greenhouse]: The battery panel of the solar attic fan kit is made of high-strength tempered glass and aluminum frame. The main frame of the solar vent fan is made of acrylic panel and ABS protective material, equipped with aluminum alloy mesh, which is , waterproof, rust proof, and can withstand various adverse weather conditions outside the room. [Hight Efficient Solar Fans For Outside]: These solar power fan set is equipped with a 15W high-efficiency solar panel, which easily powers our four fans, creates high-speed airflow, easily removes indoor hot air, and keeps indoor air cool. [Widely Used]: The solar fan is equipped with a 16.4FT/5m extension cable, so you can install it anywhere, such as in greenhouses, chicken houses, sheds, dog houses, window vents, barns, cowsheds, RVs, treehouses, attics, etc.It also comes with a USB adapter cable, which allows you to unplug the solar panel cable at night and connect it to the power supply using a USB cable.