Push to Talk adapter with a remote PTT audio connector. Attaches to Icom radios F3/F4,F3S/F4S, F4TR, F10, F20, IC-H2, H6, J12, M5, U12, U16, F3G/F4G, F3GT/F4GT, F3GS/F4GS and to E.F. Johnson 7500 Series radios. NATO Wiring
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