The Rena air pumps offer you power, silence and versatility in one attractive package.These pumps maintain optimum flow, even in the deepest of aquariums and are so quiet that they can be used in any room in the house – even the bedroom!EXTREMELY QUIETUnique construction of the Rena Air pumps reduces vibrations and residual noises : less than 30 dB at a distance of 1 meter.UNIQUE DESIGN Fitting of base to casing guarantees soundproofing. Special extension chambers (Rena Air 200 to 600) absorb vibrations and reduce noise from valves. Air 300: Aquarium volume: up to 300 L Airflow : 200 L/h Pressure : 300 mb Power: 4 W 1 air outlet Airflow adjustment Dimensions (H x W x L) : 75 x 165 x 85 mm Includes airstone, check valve, and 2.5 m of tubing.