Key Features Build to Last: Made of ABS, this product is impact-resistant, rust-resistant, corrosion-resistant, sturdy, and not easy to deform, ensuring your long-term use. Powerful Function: In summer, 7 fan blades combined with corresponding wind speed can lower the temperature inside the fish tank by 35.6-41 °F. In spring and autumn, this product helps to maintain a constant temperature in the aquarium, and in winter it speeds up the water flow and helps to increase the oxygen content of the water. Easy to Adjust: You can choose the appropriate wind speed (3000 ± 10% RPM) through a speed controller according to your actual needs to meet the temperature requirements of different seasons and organisms in the fish tank. Thoughtful Design: The adjustable width of the fan bracket can reach up to 180 °, making it highly adaptable and easy to install and move. Application It is suitable for fish tanks with a wall thickness of 15 mm and a length of less than 23.62 inches. It is suitable for different fish and aquariums. Specifications Color: Black/ Black+White Style: Modern Shape: Rectangular Material: ABS Noise: 30-40dB Applicable Fish Tank: Less Than 60cm/23.62in(Length), 15mm/0.59in(Wall Thickness) Voltage: AC 220V Power: 3 x1.9W Wind Speed: 3000 ± 10% RPM Adapter Input: 100-240V 50/60Hz 0.3A Max Adapter Output: 12V 1A 12W Power Cord Length: 150cm/59.06in Number of Each Fan's Blades: 7 Number of Fan Heads: 3 Product Size: 30*15*3.5cm/11.8*6*1.4in Packaging Size: 30.7*14*7.2cm/12.09*5.51*2.83in Gross Weight: 0.48kg/1.06lbs Package Included 1* Aquarium Fan 1* Adapter 1* Speed Controller 1* Chinese&English Manual Notes 1.Please read the manual carefully before installing and using it.