This low voltage mini fan system has temperature controlled fans. Depending on the temperature, the fan speed will decreaseor increase to allow for optimal conditions inside the terrarium.The base set consists of a transformer and twofans so that one fan can be used to blow fresh air intothe terrarium while the other pulls out the exhaustedair. This way an optimal circulation is ensured. Thefans are excellent for animals that need high air circulationlike chameleons.One transformer can be used with up to 4 fans.Extension fans are available separately. New is theprotective net in plastic in front of the ventilators.These have a fine gauze in between, so that also smallfodder insects cannot escape any more by the ventilator.