Uniclife Aquarium Air Pump with Accessories, Adjustable Oxygen Pump for 10-100 Gallon Fish Tank Uniclife Adjustable aquarium air pump is perfect for both Freshwater and Marine Aquariums. 4Watt, 4-LPM, Pressure: 0.016Mpa. Adjustable flow rate with 2 outlets, fit for fish tanks from 20-gallon to 100-gallon. Ultra whisper quiet, Minimum 25dB (sound like rusting leaves, ticking watch) in lowest flow rate. Comes with everything you need. Accessories Includes: 2 x Return Valve, 2 x Air Stone, 2M Airline, 2 Connectors.Come with 1 Year Warranty It is whisper quiet on low, and has a noticeable hum in a silent room when running on highest. Placing a blanket or soundproofing material under it will make it quieter. It has a Smooth rotating dial to control the dual ports output. A higher setting generates more air and bubbles, but will certainly increase the noise level a little bit. Designed with double outlets to run the 2 ports together. Use the T connector combine two output ports to create silent and powerful single