Features: Brushless, permanent magnetic rotor, maintenance-free. Stator and circuit board sealed by epoxy resin. Amphibious design. Enclosed with static sealing, not dynamic, which can avoid leaking problems. Small size, high efficiency, low consumption, low noise (less than 35db). Wide temperature resistance range from 0C to 100C. Used in Aquarium, car cooling, humidifier, air conditioner, other cooling and circulation systems.