Features: 1.ADJUSTABLE CLAMP OPENING: Aquarium cooling fan with a 1.2cm or 0.5in wall thickness, suitable for all daily aquarium use. 2.12V SAFETY VOLTAGE: Aquarium cooler uses high safety standards to ensure the safety of the fan, with safety insulated wiring to eliminate dangers. 3.ALUMINIUM ALLOY STAND: Fish tank cooling fan with aluminium alloy brackets for durability and longevity, giving the fan a longer life, strong and durable. 4.QUIET OPERATION: Fish tank cooler with silent technology, the motor system is carefully tuned to produce 30 percent less noise than before. 5.ADJUSTABLE: Fish tank cooling fan is free to adjust the air speed, the air strength and, depending on the weather and the room temperature, the temperature can be reduced by 2 to 4 degrees Celsius. Specification: Item Type: Fish Tank Cooling Fan Material: Plastic, Aluminium Alloy Plug: US Plug, Rated Input Voltage: 100-240V, Rated Output Voltage: DC 12V Features: 1. Elegant shape, beautiful and generous. 2. Hanging design, safe and stable. 3. Use DC12V DC power, safe and secure. 4. The coil is far away from the water surface of the fish tank, so it will not cause short circuit and danger. 5. Free to adjust the wind speed, strong wind, depending on the weather and room temperature, the temperature can be reduced by 2-4 degrees Celsius. 6. Reduced noise and free angle adjustment. PackageList: 1 x Fish Tank Cooling Fan 2 x Plastic Screws 1 x Plug