for Smith Corona or Plantronics Headset. Manual mute on
each side. With buttons up - both people can hear and speak.
One side down - that side can not talk but both can hear.
Must have the bottom headset cord (QD to modular clip) for the headset
to plug into adapter
with Smith Corona amps, Plantronics T10, S10,
S11, S12, and will plug directly into most
P11635 - Buy
with M10, M12 and M22 amplifiers and most Smith Corona
- Buy $21.95