The TOA Electronics Q-RM9012PS Remote Paging Microphone features an all-call button for selecting all zones. It also comes with a clear button for clearing all zone selections.
Announcement to the selected zones out of a maximum of 12 zones
Paging zones may be selected individually or in groups
An all-call button for selecting all zones
A clear button for clearing all zone selections
LED indicator for each selector
Unidirectional electret condenser microphone with balanced audio output
All connections to amp/speaker selector via shielded CAT5 cable
AD-246 power supply included