[Improve Air Circulation: Place the fan on the top mesh of the terrarium it will blow the wind into the reptile enclosure make the air exchanging and eliminate odors. Mimic the wind create a cooling breeze for your pets. Decrease Humidity Automatically: Set a humidity threshold for your pets once the humidity in the enclosure is higher than the value you set the fan will work automatically. The ventilation Fan can efficiently decrease the humidity 3-5% in several minutes. No Assembly Tools Required : There are two methods you can place the fan for terrarium. Place it on the top mesh or hook it in the enclosure(Hook is included in the package). Strong Wind But Low Noise: 2700RPM speed it can help to draw hot air out fast possibly reducing the temps by a few degrees creating a cool environment. Meanwhile the noise of the ventilation fan is 28dB quiet when it work won’t scare your pets. The ventilation fan is ideal for both rainforest or desert reptiles. Suitable for those enclosure with limited ventilation such as rack & tub system terrarium(wooden pvc) grow tents furniture conversions.]