The CTR2-Mini Audio I/O interfaces your radio’s Tx/Rx audio, CAT, PTT, and Key signals to the CTR2-Mini Audio Controller.
NOTE: The Audio I/O module is not directly compatible with the CTR2-Mini or CTR2-Mini+. If you’re not using the Audio use the CTR2-Mini Radio I/O to connect the Mini or Mini+ to your radio.
The Audio I/O module is available as an assembled module or a PCB kit.
You can download the assembly manual here.