Thank you for viewing! This is a cooling fan for aquariums, a water tank fan, a water tank cooler, a fan to prevent water temperature rise, a cooling fan for fish keeping, an aquarium fan, a large-sized aquarium cooling fan, easy to install, with adjustable airflow at 2 levels. Product Specifications: (Large Size) Size: 18cm * 10.5cm * 6.5cm Color: Black AC Adapter: Input: AC100V～240V 50/60Hz Output: DC12V 1A Cable Length: Approximately 140cm Weight: Approximately 200g (main unit) Installation Method: Simply fix it to the aquarium with screws. Easy to install and remove, with an adjustable design. *Applicable to glass with a thickness of 14MM or less. Product Description: "Quiet Design" This aquarium cooling fan adopts a noise prevention design and is quieter than ordinary fans. It can be used in both freshwater and saltwater aquariums. "Adjustable Airflow" This is an aquarium fan with 2-level adjustable airflow, 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°C by blowing strong air onto the water surface. ★These are imported products, and we select high-quality items! We carefully inspect each one before shipping! Due to being made overseas, there may be minor scratches during transportation and storage, so please refrain from purchasing if you are concerned about minor details or if you are looking for a product like those made in Japan.