Description: 【Effective Cooling】For most aquatic organisms, too high water temperature is dangerous, Aquarium Cooling Fan will make it easy for you, let your lovely fish have a cool and comfortable summer immediately. 【2 Variable Speed】Aquarium chiller fan, there are two wind speed adjustable, can cool down the fish tank by about 2-4°, provide a comfortable water temperature for your fish. 【Wall Mounted】Aquarium chiller cooling fan, external wall mounted design, adjustable Jaws can Clamp the tank wall that thickness within 8 mm 【Portable】Mini fish tank cooling fans, Usb interface, simple and convenient operation, Small size, easy to install, no assembly required, does not occupy the space of the fish tank 【Tips】When using aquarium cooling fan, the water in the Fish Tank will Evaporate over time, Please Increase water in time Specification: Material: ABS Size: 7cmx3cmx12.5cm/2.76inchx1.18inchx4.92inch Package Includes: 1Pcs Aquarium Chiller Fan Note: Please allow slightly errors due to manual measurement and different monitors.