Aquarium Cooling Fan 2 Head Aquarium Chillers Cooling Fan Wind Speed Adjustable Aquarium Chillers for Salt Fresh Water Features: Elegant design, hanging style for added security. Uses DC12V DC, safe and stable. Strong wind, can cool down 2 to 4 degrees depending on the weather and indoor temperature. 180° rotation, easy to install and move. The coil away from the aquarium water will not cause a short circuit hazard. Strong wind, according to the weather and the indoor temperature is different, be cool 2 to 4 degrees. ABS all-plastic package design, energy saving and electricity saving, noise cancellation processing for quiet operate. Specifications: DC Voltage: 12V Power cord length: 115cm Clipable glass thickness: 1.5cm Style: 2 Fans 2 fans for fish tanks below 40cm Size:21*13.5*5.5cm Power: 1.9W*2 Package size: 22.5*7.5*14cm Package weight: 490g 4 fans for fish tanks below 80cm Size: Size:40*13.5*5.5cm Power: 1.9W*4 Package size: 40*14*7.5cm Package weight: 774g