Superset 4000 Programmable Key Module

Specially designed for Mitel, these headsets plug directly into the dedicated interface jack provided on the Mitel Superset 4000 digital telephones. The jack is designed with unique circuitry for headset amplification with volume control enabled through the telephone volume control keys. User mobility is improved through a quick disconnect plug that allows users to move away from the telephone while on a call, without removing the headset.