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. Submersible installation and entirely waterproof. Low consumption; low noise(less than35db). Super long working life(more than 30,000 hours). Wide temperature resistance range from 0°C to 100°C. Used in Aquarium, car cooling, humidifier, air conditioner, other cooling and circulation systems.