Feature:1. Wall Mounted Design: Fish tank chillers fan adopts external wall mount design, beautiful, small size, easy to install, not occupy the fish tank space.2. Fast Cooling: Aquarium cooler fan's air outlet adopts 45 degree angle design, for the water surface cooling faster, the water surface can be cooled down quickly.3. USB Connector Design: Aquarium cooler fan adopts USB connector design, which is safer to use, with a switch at the bottom, you can adjust the fan speed according to your needs.4. Applicable: Aquarium cooler fan is powered by 2.5W, silent cooling fan. Suitable for fish tank under 30cm/11.8in.5. Premium Material: Wall mounted fish tank cooling fan is made of premium ABS material, strong and durable, wear resistant, long service life.Specification:Item Type: Aquarium Cooler FanMaterial: ABSSize:Length: Approx. 13 cm/5.1inWidth: Approx. 7 cm/6.7inThickness: Approx. 2.8/1.1inTop Width: Approx. 5.5cm/2.2inUse: Fish Tank Cooling Fan, Cooling FanMaximum Air Volume: 4.5FCMMaximum Wind Pressure: 0.35 mmH20Power: 2.5WSuitable for Tank Wall Thickness: 9mm/0.35inSuitable for Fish Tank: 30cm/11.8in.Package List:1 xAquarium Cooler FanNote:Please allow for some errors in manual measurements.