[Effective Cooling]for most aquatic organisms, too high water temperature is dangerous, Aquarium Cooling easy , let your lovely fish have a cool and comfortable summer immediately. [2 Variable Speed]Aquarium, 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 Note: Please allow slightly errors due to manual measurement and different monitors Material: plastic colour: White Package Contents: 1 x quiet fish tank fan Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.