The headset jack accepts an earphone or microphone-style headsets that are sold separately for times when you want more privacy or when you are working in a noisy environment.
When you attach a headset, the microphone operation of the device is suppressed. The speaker is also suppressed unless you turn on the Announce through Speaker property. For more information, refer to Using the Announce through Speaker Commands.
On a Vocera badge, you can adjust the volume for a headset separately from the badge speaker volume. For more information, refer to Adjusting the Volume.