Features:Brushless, permanent magnetic rotor.Low consumption and low noise(less than 35db).Amphibious design, submersible installation and entirely waterproof.4 rubber suckers on the bottom, can adsorb on the smooth surface and reduce noise and vibration.Enameled wire coil and circuit board are sealed by epoxy resin.The coil adopts pure copper enameled wire, lower temperature rise and longer life span. USB interface, DC 5V input.Enclosed with static sealing, not dynamic, which can avoid leaking problems.Description:IP68 waterproof grade, totally submersible in the water.With a filter, avoiding blocking the inlet.Wide temperature resistance range from 0C to 100C.Used in Aquarium, car cooling, humidifier, air conditioner, other cooling and circulation systems.