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 The solar panel fan kits can be used in homes, greenhouses, utility room, pet houses The double fans are equipped with double-layer metal protective net to small animals from being injured and protect the normal operate of the fan Easy to use: Place the solar panel in a place that can receive sunlight, install a fan, and connecting it for use. None Wiring usage is flexible The fan solar panel kits can exhaust indoor hot air and effectively reduce indoor temperature, Manufacturer: REITINGE