Novel design and generous, use the variable frequency technology, small power, large flow, high head, super mute, and both sea and land. Use ceramic shaft, wear resistance, no rust, long service life, both fresh and seawater, do not contain the copper element. This product realizes free tool demolition, easy to clean. The outlet realizes multistage over, suitable for a variety of pipe diameter connections. The locked-rotor protection function. (Immediately cut off power after water leaf card dead).