Williams AV MIC-145 is a noise canceling headset microphone with TRRS 3.5 mm plug for use with Digi-Wave DLT 400 transceiver only. Experience clear communication with this dual headset microphone with TRRS 3.5mm plug. This microphone is compatible with the Digi-Wave 400 Transciever, the IC-2 interpreter console via the TRRS input, and the Digi-Wave 100/300 Transceivers when paired with the AC ADP3 adapter.