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. LED screen display 5. with a restart function with a 10-minute power break. 6. with memory function, effectively ensure that each power-off restart is started by the parameters set by the power-off. Scope of application: aquarium, garden fountain, water craft , water air conditioning fan, machinery and equipment cooling and many other fields.