Features. Energy-efficient motor with advanced electronic frequency conversion technology, 65% energy saving, super quiet. 2. suitable for saltwater and freshwater, without copper elements. 3. adopts wear-resistant ceramic shaft, long service life. 4. with 8/10 level head flow adjustment function. 5. with 10 minutes power pause restart function. 6. With memory function, effectively ensure that every power failure restart by the power failure set parameters to start. Scope of application: aquarium, garden fountain, water craft, fan water-cooled air conditioning, machinery and equipment cooling and many other areas.