As an option to the SIP Talk-Back speakers SC15 Network Ceiling Speaker and SW15 Network Cabinet Speaker, the BM11 Audio Button with Mic enables calls to the SIP Talk-Back speakers that can be initiated or answered from a remotely mounted switch, as well as trigger the preset task(s). The BM11 button is only suitable with the ZYCOO Network Speakers SC15 and SW15. After the pressto-talk feature is enabled and configured through the system Web interface, when the button of BM11 is pressed, the speaker would initiate a SIP call to a predetermined extension or trigger a task. The task(s) can be pre-recorded announcements, emergency alerts, or just play background music. Press again to end the call feature is also available.