1)no need electric circuit refitting,easy installation
2)small in size,low cost plug in and play
3)Reactive power compensation on the spot,improves power factor.
4)Reduces resistance in the circuit
5)Reduces the abnormal heat for electric equipment
6)protects device from overloading and under voltage situation
7)prolongs the working time of devices by more than 30%,low down the repairing cost
8)made with high quality components up to 2-5 years working life