have UL,CSA,CE,TUV,GS,BS,SAA,PSE,EK,FCC ,Brazil, EMC Leads-out EI Transformer ... volume and low weight Low no-load losses Low mechanical hum Good shielding performance and low magnetic leakageHigh efficiency Easy to ... ' advicePacking:Carton EI transformer have UL,CSA,CE,TUV,GS,BS,SAA,PSE,EK,FCC ,Brazil, EMC