Unidirectional Condenser Addressable Microphone, compatible with all system units, PSMWJB-V3 uses an RS485 protocol over a single CAT5 cable connection, to transport both Audio and Power from the PSMWJB-V3 to the system units. The PSM WJB-V3 comprises of 8 zones / 8 buttons with sleek condenser gooseneck microphone, and spring metal protection, providing durability and excellent aesthetics as well as allowing up to 256 zones expansion via the additional Keypad 
easy extension station. The buttons can represent a single zone or a group of zones and are easily defined via the GUI of the system units using a simple Matrix selection.