uniclife aquarium air pump 4 watt 4-lpm 2 outlets with accessories, adjustable oxygen pump for 20-100 gallon fish tank uniclife the uniclife air pump is designed to oxygenate your aquarium efficiently and quietly with its low power consumption and advanced air compressing system. you are purchasing a high quality air pump suitable for use with any freshwater and marine aquariums.<br> <br> the pump comes with 2 air stones, 2 return valves and 2 connectors. this model has an adjustable valve - meaning you can adjust the air flow rate.<br> <br> <b>about super quiet.let us face the truth.</b><br> <br> we have test uniclife air pump to work on lowest flow rate, it sound 25 db, which sound like rusting leaves, ticking watch.<br> then we test it to work on highest flow rate, it sound 43db, which sound like <b>quiet whisper at 2 ft., park. </b><br> <b>sitting on a folded cloth to make it quieter.</b><br> <br> <b>specification:</b><br> recommended tank size: 60 to 400 liter<br> voltage: 110~120v 50/60hz.<br> exhaust: 4.0 l/min. 2.0l/min x 2<br> pressure: 0.016mpa.<br> power: 4.0w.<br> dimensions: 5.1" x 2.8"x 2.5".<br> internal diameter of airline: standard 4mm <br> length of the power supply cable: 6 ft / 1.8m<br> <br> <b>package includes: </b><br> 1 x air pump<br> 2 x return valve<br> 2 x air stone<br> 1 x 6.5 ft airline<br> 2 x connector<br> <br> <b>how to set up:</b><br> cut the tubing to the required length. connect the tubing to the pump and your air stone. plug in. simple.<br> we just ensure that the pump is never lower than the tank. if that is not possible, fit a check valve to stop any water flowing back from the tank into the pump!