- Includes pre-installed noise canceling microphone, which reduces sidetone noise up to 80%- Does not require hook switch in the cradle- Round receiver and transmitter ends- RJ22 4 conductor connector- Compatible with Cortelco 2500 and 2554 series telephones
- Includes pre-installed noise canceling microphone, which reduces sidetone noise up to 80%
- Does not require hook switch in the cradle
- Round receiver and transmitter ends
- RJ22 4 conductor connector
- Compatible with Cortelco 2500 and 2554 series telephones