Product Description:This is a cooling fan for freshwater and saltwater aquariums. The wind is strong. You have two kinds of wind intensity to choose from. It reduces the heat transfer from aquarium equipment. It is quieter and more flexible than ordinary fans.Specification:Colour: BlackType: 4/6Material: Plastic + Aluminum AlloyTransformer output: 12VCurrent: 0.2-0.8APower cord length: 120 cmPower:4 FAN (1.9W*4)6 FAN (1.9W*6)Size:4 FAN: 39*12.7*6.5cm(15.35*5*2.56 Inch)6 FAN: 59*12.7*6.5cm(23.23*5*2.56 Inch)Features:1. Elegance and beauty.2. Hanging mode design, safety and stability.3. Using DC12V DC and Safety Guarantee.4. The coil is far from the water surface of the fish tank and will not cause danger of short circuit.5. Freely adjusting wind speed, strong wind, depending on the weather and indoor temperature, the temperature can be reduced by 2-4 degrees Celsius.6. Reduce noise and adjust angle freely.Package Included:1x Cooling Fan1x US plug Power Adapter Note:Suitable for fish tanks with glass thickness not exceeding 12 mm.Please allow 1-3CM differs due to manual measurement.Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding.