Thank you for viewing! This is a USB aquarium cooling fan, a water tank fan, a water tank cooler fan, designed to prevent rising water temperatures, for fish keeping, a cooling fan, an aquarium fan, a small aquarium cooler, easy to install, adjustable airflow, 2 levels, USB powered. Product Specifications: Size: 13cm * 7cm * 5.5cm Color: Black Power supply: USB (cable length approx. 90cm) Weight: approx. 100g Installation method: Simply fix it to the aquarium with screws. Easy to install and remove, adjustable design. *Applicable to glass with a thickness of 8MM or less. Product Description: "Compact aquarium fan" It's about the size of your palm, suitable for small aquariums, and keeps the aquarium looking neat. "Quiet design" This aquarium cooling fan adopts a noise prevention design and is quieter than ordinary fans. This cooling fan can be used in both freshwater and saltwater aquariums. "Adjustable airflow" This aquarium fan has 2-level airflow adjustment, which can be easily selected according to your needs. This cool fan series is very useful for preventing water temperature rise, and can lower the water temperature by 2-4℃ by blowing strong air onto the water surface. ★These are imported products, and we have selected high-quality items! We carefully inspect each item before shipping! Please note that due to overseas manufacturing, there may be minor scratches during transportation and storage. If you are concerned about minor details or are looking for a product like a Japanese-made product, please refrain from purchasing.