Feature:1. Waterproof Function: The solar panel is coated to prevent short circuit or damage caused by rain. It is suitable for outdoor environment. (the solar panel is waterproof, but please be careful not to let the USB interface into the water) the solar fan has no built in battery and can only work during the day.2. Solar Power Supply: Powered by solar panels, it is easy to install. Just connect the interface between solar panels and fans, and then put them in the sun. The fan runs fast in direct sunlight. When the sunlight is weak, the fan will slow down or stop running.3. Air: The solar panel fan can push out the hot air and push in the cold air, effectively reducing the indoor temperature and keeping the air .4. Protection: The fans are equipped with double protective to prevent injuries to hands and small animals and the normal operation of the fan blades. You can purchase 1 or more as needed, connect them to the middle or both ends of the greenhouse or install them on the wall, DIY your own air circulation system.5. Widely Application: In the hot summer, it is suitable for small chicken house, greenhouse, shed, pet house and window exhaust, which is efficient and practical.Specification:Item Type: Solar Powered Exhaust FanMaterial: Monocrystalline Silicon, PET LaminationWeight: Approx. 496g / 17.5ozSolar Cell Material: High Efficiency Monocrystalline SiliconSolar Panel Power: 10WSolar Panel Working Voltage: 12VSolar Panel Size: 360 x 180 x 3mm / 14.2 x 7.1 x 0.1inOutput Port: DC5521Cable Length: 98cm / 38.6inFan Power: 3WFan Air Volume: 43.4CFMFan Size: 12 x 12cm / 4.7 x 4.7inFan Speed: 2000(r/min)How to Use:Install the protective net cover on the fan with screws, connect the DC interface to the solar panel, and the solar panel can be facing the direction of sunlight.Package List:1 x Solar Panel1 x Fan2 x Protective Net4 x Protective Net