This aquarium cooling fan is capable to reduce water temperature and drop up to 2 ~ 4, meeting the daily use of fish tanks. There 1 to 6 heads fans for you to choose in accordance with your demands. Features: Two-gear Wind Control: According to the indoor temperature, the cooling fan is capable to reduce water temperature and drop up to 2 ~ 4. (The 5 heads fan and 6 heads fan have only 1 gear) Easy to Use: This fan can be directly clamped on the aquarium that the thickness within with 15mm, no additional installation methods are required, and it is very convenient to use. Adjustable Fan Head: Adjustablebracketsallowfor a 45-degreemovementofthehead. You can control the direction of airflow according to your need. Safe & Practical: Great cooling fans 12V safe voltage, with high-security standards, and ensure the safety of the fan. It meets the daily use of fish tanks. Multiple Types optional: There 1 to 6 heads fans for you to choose in accordance with your demands.After-sales Service Guarantee: Any problem, please contact our store without hesitation. Honor to serve you! Specifications:Item name: Cooling Fan for Fish TankMain material: PlasticsColor: BlackType: 1 Head Fan/2 Head Fans/3 Head Fans/4 Head Fans/5 Head Fans/6 Head Fans optionalInput voltage: 100~240VOutput voltage: DC12VTemperature dropped range: 2~4Suitable for: