No specific features listed.
One of the quietest air pumps available, Marine Metal Products Quiet Bubbles® Air Pump runs up to 40 hours on 2 D batteries (not included). The pump features a rubber booted switch, beryllium copper battery contacts, and a weighted airstone for greater dissolved oxygen and 24" of silicone air line tubing enclosed in pump. Overlap case construction with neoprene seal. Use in fresh and saltwater. Pumps 1.4 STL/minute. Aerates 7.5 gal. 1.5V.
