Feature: 1. ❄ 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) 2. ❄ 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. 3. ❄ Adjustable Fan Head: Adjustable brackets allow for a 45-degree movement of the head. You can control the direction of airflow according to your need. 4. ❄ Safe \u0026 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. 5. ❄ Multiple Types optional: There 1 to 6 heads fans for you to choose in accordance with your demands. Specification: 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: Adjustable brackets allow for a 45-degree movement of the head. 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 Tank Main material: Plastics Color: Black Type: 1 Head Fan/2 Head Fans/3 Head Fans/4 Head Fans/5 Head Fans/6 Head Fans optional Input voltage: 100~240V Output voltage: DC12V Temperature dropped range: 2~4℃ Suitable for: <15mm thick Rated power: 1 Head: 2.2W; 2 Heads: 4.3W; 3 Heads: 6.5W; 4 Heads: 8.6W; 5 Heads: 10.8W; 6 Heads: 13W Size: 1 Head: 106 * 95mm; 2 Heads: 203 * 95mm; 3 Heads: 297 * 95mm; 4 Heads: 392 * 95mm; 5 Heads: 488 * 95mm; 6 Heads: 581 * 95mm Package Information: Package size: 1 Head: 13*11.5*7.5cm; 2 Heads: 21*13*7.5cm; 3 Heads: 30.5*13*7.5cm; 4 Heads: 39.5*13*7.5cm; 5 Heads: 51*13*7.5cm; 6 Heads: 59*13*7.5cm Package weight: 1 Head: 280g; 2 Heads: 490g; 3 Heads: 660g; 4 Heads: 840g; 5 Heads: 1060g; 6 Heads: 1240g General box packing. Note: * There could be a few deviations due to manual measurement or slight color difference owing to photographing condition. Thank you for your understanding. Packing List: 1 * Fan 1 * Charging Adapter Package List: 1 * Fan 1 * Charging Adapter