This microphone is configured to be used with the QRP-Labs QMX and QMX+. It will also work with uSDX radios and the Elecraft KX2/3. The required stereo audio cable is not included. Known working radios: QMX: (Tip=PTT, Ring=Mic) KX2/3: (Tip=Mic, Ring = PTT) The fully assembled mics will come with conformal coating on the back…