The pump includes 3 modes: 10 levels adjustable mode, wave mode and feed mode. Use German technology, operation noise lower than 35Db. The pump has circulation and wave- making functions. Use low-voltage DC brushless control technology and advanced 6-pole sensorless. 3-phase drive, the pump speed and power can be changed by adjusting PWM duty cycle and soft start, which has longer service life and lower noise. Ceramic shaft and bearing, make the pump have longer operation life. Reliable and efficient, have small shape. Can be used in fresh and sea water.