Aquarium Cooling Fans Cold Wind Chiller Adjustable Water Cooler 2 Fan Heads Characteristics: No assembly required, easy and practical to use. Easy installation (mounting clamp). High quality plastic construction, powerful cooling fans. Increase air movement to reduce heat and humidity. Extend the life of your lighting system. Low power consumption, adjustable 2 levels of wind power. With an AC adapter, powered by 12V DC. Angle adjustment, perfect for saltwater aquarium (reef tank and frag) and freshwater aquarium. Note: The clamp mounting bracket can fit on Aquarium walls up to 1/2 "(12mm) thick. Specifications: Color: Black Material: plastic Type: 2 fans Fits tank rim up to: 12mm (adjustable) Cooling 2-4 degrees AC adapter: 100-240V 50 / 60Hz Power supply: DC 12V 0.6A Item size: approx 20 x 12.5 x 6.5cm / 7.9 x 4.9 x 2.56in Item weight: 356g / 12.58 oz Package list: 1 x cooling fan 1 x power adapter