Function: Firstly stage differentials mode filtering Third stage common mode filtering, bidirectional Electromagnetic Interference filtering, interference, prolonging the service life of electrical appliances, increasing the stability of the equipment Three set of common mode formed by combining 2 capacitors and common mode inductors 1 set of differentials mode and two differentials inductors used for differentials mode filtering of power supply to suppress mediums and high frequency interference Noise is filtered better due to the use of three-stage filtering Thin design, all-aluminum housing