Remote microphone is designed 9000M2 series of mixer amplifier. It efficiently select desired speaker zones in a public address system and is easy to interface with different system by connecting the 12 dry contact control signals. Depending on whether a zone selector button or the all-call button is pushed, message broadcast to all zones or individual zones can be achieved. Besides, a clear button is also designed to clear all selection at one touch to facilitate easy operation. LED beside each button shows the status of each zone allows operator to understand situation of each zone at a glimpse.