Hi, Together with my KX3 (#29) I also ordered “Proset-K2 Boom Headset For the KX3/K3/ K2 (Heil iC element)”. Now I need help to connect ProSet-K2 to KX3. Phone connection is OK but when I connect the microphone connector to MIC (mono connector) KX3 starts transmitting. Any help would be appreciated. 73, Ruchan TA2AH