High efficiency by the permanent magnet brushless motor driving. Big water flow rate and high delivery head With ceramic shaft and bearding. High rub resistance materials with long life. Ideal for fresh and sea water use. Multi safety protection functions such as overcurrent, overheat ect. Safe and reliable. Industrial ABS plastic casing. Impact and corrosion resistances. Ideal working conditions for low water level by bottom water suction Silent running and powerful suction.