... connector compatible with ham raido Detailed specifications :1,Unidirectional CB microphone2, repalcement electret CB microphone3, CB microphone with multify pins4, ... OEM acceptable parameterB Microphone microphones for CB mobile radios Sensitivity-66+3dB at 1K HzImpedence500 ... . About us :We are the professional CB radio products , CB micophone , CB speaker and two way battery manufacturer . ...