Minimal noise, maximum air flow. The Whisper® Air Pump’s dome shape actually flattens sound wave frequencies. In addition, each model features sound-dampening chambers designed specifically for that model. And the air pump's rubber feet and suspended motor prevent sound waves from reflecting off surfaces such as tables and shelves. Available in models for tanks from 10 to 100 gallons, Whisper Air Pumps provide a powerful flow of air. UL listed.