Features: 1. Wind Speed Adjustable: Two-speed wind control,according to the indoor temperature, reduce water temperature up to 2 ~ 3. 2. Clip On Design: Adjustable jaws can clamp the cylinder wall with thickness within 1.2cm. Suitable for small or middle or big aquarium tank. 3. Safe&Secure: Great cooling fans with 12V safe voltage and high security standards, ensure the safety of using. 4. Angle Adjustable: You can change the wind direction by adjusting the angle between the fan and the fan clip, meet the cooling needs of different fish tanks. Adjustable angle up to 100, practical in use. 5. Quiet Operation: Perfectly improved fan motor, effectively reduces the noise during fan operation, which makes the our aquarium fan 10 db to 12 db quieter than other similar products, providing your pet a quiet and cool summer. Package Includes: 1 Piece Aquarium Cooling Fan 2 Fans Specifications: Material: Plastic, Alloy Bracket Color: Black Weight: Approx.480g Plug Type: US/EU Output: 12V Power: 3.8W Applicable Glass Thickness: 1.2cm/0.47in Power Cord Length: 1.2m/47.24in Size: Fan Approx.9.5x3x9.5cm/3.74x1.18x3.74in, Bracket Approx.20.3x3x6.5cm/7.99x1.18x2.56in note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!