The API Rena Air 300 Pump was created with noise suppression chambers that were designed to absorb vibration from air movement, therefore minimizing noise and vibrations for extremely quiet operation. The unit has fitted rubber feet that also help stop vibration with the surface it is placed on. These new features help to make the Rena Air 100 extremely quiet. The unit was designed to be very powerful and can even maintain great airflow in the deepest of depths with clogged air stones or bubble wands. Features 1 air outlet and 1 adjustable control.