... 1.low noise 2.certificate :CE,SGS,ISO9001 3 copper conductor 4 price is low but quality is better ... First introduce goods : 1 the conductor material is copper wires ,so that resistance is weak ,and conductor electricity ... EXPO ,CCTV and so onSecond model and type :Mic cable ModelTypeConductorNom.O.DmmElectrical characteristicShieldweightkg /100mStructrue root/mmCross-sectionmm2conductor DC ...