Extremely low operation ensures a quiet and proper aquarium environment Variable frequency adjustment technology adjusts water flow strength and fluctuating frequency according to demand to simulate natural marine environment Waterproof and corrosion-proof components, suitable for a variety of water environments, strong durability and long term reliable operation Multiple water flow models available including gentle fluctuations and strong waves to promote healthy growth High efficiency motor, energy saving, prolong service life, provide stable and strong water flow, Manufacturer: Pffiocix