HITOP 110GPH Powerful Aquarium Air Pump: Qiuet 2-outlets Aquarium Aerator, Adjustable Fish Tank Air Pump with Accessories, for 20-200 Gallon Tank.My review:Most aquarium air pumps have a single-layer casing. This aquarium aerator pump adopts the design of internal air pump + external black shark casing, which greatly reduces the noise, and the max noise does not exceed 35dB.[ON/OFF Button] This aquarium oxygen pump is equipped with a ON/OFF button, most of the aquarium oxygen pumps do not have. So that you don't need to unplug or plug in the plug frequently, which is more convenient to use.Bonus Accessories, The necessary accessories such as air tubes, air stones, and check valves are attached, as well as air tube fixing suction cups and T-connector tube which may be used. Aquarium air pump kit, as far as possible to meet your needs.HITOP 110GPH very Powerful Aquarium Air Pump: With 2 Qiuet outlets to Aquarium Aerator, Adjustable Fish Tank Air Pump with Accessories, for 20-200 Gallon Tank.Item #: 43109852HITOP operates on (110-120) volts, a step-down power converter is required for the smooth device function outside USA. It is mandatory to know the wattage of the device in order to choose the appropriate power converter.Black Shark Aquarium Air Pump Size 6.3*4.3*4in, which is larger than the ordinary 2-outlets aquarium aerator. The shape design that imitates sharks can adds some fun to aquarium lovers.Powerful and Adjustable Fish Tank Air Pump 4W Powerful fish tank air pump, strong air pressure, large air flow, max air flow up to 110GPH. There is also an adjusting knob to adjust the air volume of this fish tank air pump. Suitable for medium and large fish tanks of 20-200 Gallon.