The Tetra Whisper Air Black Pump operates with minimal noise and maximum efficiency. This Tetra Air Pump features sound dampening chambers and a suspended pump motor to enable ultra-quiet operation. This Tetra Whisper Air Pump 10-30 also has rubber feet. The Tetra air pump for aquariums has a unique dome shape that actually flattens out sound wave frequencies. This Tetra Whisper Pump also reduces noise by preventing reflective sounds from bouncing off nearby surfaces. Together the features in this Tetra Whisper Pump help keep your aquarium working as it should without excess or disturbing noise.