1. Powerful Fish Tank Air Pump: Max Air Flow Rate: 255GPH(4LPM4), Pressure: 0.02MPa, Power: 12 W. This aquarium air pump fits both fresh and saltwater tanks, which is perfect to be used for all types of tanks with a capacity of 1-255 gallon. This aquarium bubbler is energy-efficient and won't get overheated when running. Build up a y environment for your fish, coral, and anything alive in your tank/aquarium marine system. 2. Adjustable Fish Tank Pump: Designed with an adjusting knob, easily adjust the airflow according to your fish tank or pond size and the bubble size you desire. 3. Double-layer Design: Measuring 40 dB, this aerator pump adopts the design of a double plastic cover to reduce noise. The internal plastic cover locks the motor sound and the external seal machine noise, with 4 non-slip rubber feet on the bottom also reduce noise and prevent it from slipping, giving you and your pets sweet sleep. 4. Reliable Performance: Made of ABS plastic, the All-copper motor design is more durable. Low energy consumption under 7/24 hours. Adopt 4 outlet design, which can be used in large fish tanks, aquariums, hydroponics, seafood stalls, with a wide range of applications.