1.Frequency-changing contriled by imported micro-controller,safe and reliable.
2.External controler provide more safty and convenience,setup the power and flow according to the aquarium size ,feeding function is available.
3.Shut off automatically when without water or being blocked,non-volatile memoyt.
4.High strength mirror ceramic shaft and cover,provide an extreme low noise,and extreme long operation life.
5.Suitable for fresh water and sea water,amphibian provide more convenience.
Technique Parameter:
Voltage: 100~240V 
Frequency: 50/60Hz
Qmax: 4500 L/H
Hmax: 3.8m
Power: 13~35W
Dimensions: 160X80X100mm