MiOYOOW Aquarium Chillers, USB Fish Tank Cooler with 2 Speeds Adjustable Fish Tank Cooling Fan System for Aquariums Up to 9mm Thick

【Applicable Fish Tank】: Fish tank wall thickness within 9mm/0.35 inch (under 20L water body), can be adjusted and fixed by ABS plastic nut. 【USB Power Port】: Fish tank cooler working voltage DC 5V, can be used with peace of mind (power plug is not included in the package), energy saving and power saving, USB power cord is about 1.3m/4.3ft. 【Rapid Cooling】: Turbo fan creates strong wind power. Rapidly reduce the water temperature and lamps projected heat, strong wind, can be cooled about 2 ℃ -4 ℃, 2 wind speed adjustable. Reduce the rate of oil film on the aquarium water surface. 【Hanging Installation】: Fish tank cooling fan is thin and lightweight, simple wall-mounted, easy to use and install, space-saving. 【After-sale Service】: If you have any problems during the purchase and use process, please contact us and we will help you solve them within 1 working day.