Features: Integrating oxygenation, water circulation, and denoise functions, eliminating the hassle of purchasing multiple devices. The whole machine is flexible, beautiful, not take up space, and is suitable for various size of aquariums. The powerful motor provide effective oxygenation, improves the oxygen content in water, and promotes the healths growth of fish. Strong water flows drive water circulation, maintains clear water quality, reduces growth, and provide a cleaner living environment. Adopting advanced sound insulation technology, the noise during operations are extremely low and will not disturb the quiet of you and the fish. Specifications: Color:Four elections Dimension:8.5×17cm/3.34×6.69in 10×30cm/3.93×11.81in 18×21cm/7.08×8.26in 18×27cm/7.08×10.62in Component:ABS Package Includes: 1pc Aquariums Sponges Filter note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.