High-performance aquarium fan, silent, built-in brushless motor, aluminum alloy shell with protection level IP55. The appropriate wind speed can be selected according to the indoor temperature, the water temperature can be reduced to 2 ~ 4?, adjustable clamp can be clamped cylinder wall thickness within 20mm, no installation, easy to use, can be easily fixed to the edge of the aquarium, very firm. The Bluetooth Edition Cooling Fan can only be controlled through the mobile app My Chihiros