Telex HS-6A Black Intercom telephone handset with PTT and XLR4F

Telephone handset HS-6A headset accessory for wired intercom with XLR4F connector in black.
Dynamic Earphone 200 ohms, dynamic microphone 500 ohms. Housing arm PTT.
It is supplied with a metal hanger bracket for vertical storage and is compatible
with most user stations.