Thank you for viewing! This is a USB aquarium cooling fan, a fan for aquariums, a water tank cooler fan, a fan to prevent water temperature rise, a cooling fan for fish keeping, an aquarium fan, a small aquarium cooler, easy to install, adjustable airflow, 2 levels, USB type. 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 a palm, can be applied to 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 the water temperature can be lowered by 2-4℃ by strong airflow to the water surface. ★These are imported products, and we have selected high-quality items! We will carefully inspect each one before shipping! Please note that there may be minor scratches during transportation and storage due to being made overseas. If you are concerned about minor details or are looking for a product like a Japanese-made product, please refrain from purchasing.