The RM-911W is a remote microphone station featuring a ten-key keypad for zone selection. Key selection allows activation of pre-recorded message. The unit features a unidirectional tear-drop dynamic push to talk microphone. An audio signal level meter is provided for displaying the signal levels at the input or output. The unit displays the ready / busy state status via a LED display. The RM-911W is designed for use with the ARM-911 Automated Remote Messaging controller. It is remote powered by 24VDC which is supplied from the ARM-911 controller.