- Durable ABS Material: This aquarium cooling fan effectively lowers water temperature, creating a comfortable and healthy environment for your fish. Constructed from robust ABS material, it is wear-resistant, reusable, and safe for aquatic life. - No Batteries Needed: The aquarium cooler reduces waste by utilizing USB charging. Its USB plug design allows compatibility with any USB interface, such as tablets, power banks, or wall outlets, making it convenient for everyday use. - Adjustable Wind Speeds: Featuring two wind modes and two adjustable wind speeds, this fan allows you to switch between a gentle breeze or a stronger airflow, ensuring your aquatic pets receive the ideal cooling effect. - External Installation: Designed to mount on the outer wall of your aquarium, this fan does not occupy space inside the tank. This innovative setup keeps your fish cool without interfering with your living space. Use Scenarios: 1. Ideal for maintaining optimal water temperature during hot summer days, ensuring your fish remain healthy and active. 2. Perfect for use in smaller aquariums where internal space is limited, allowing for effective cooling without overcrowding. 3. Convenient for aquarists who travel, as it can be powered via portable chargers, ensuring your fish stay comfortable even when you are away.