Regarding the operation of the Mic 500 , is the following description correct?

Press and hold the button in the center of the Mic 500 disc for more than 10 seconds to turn the microphone on or off.

When multiple Hic 500s are cascaded, press the key in the center of one of the Mic 500 discs and the other Mic 500s cascaded on or off at the same time.

The microphone can be turned on or off via the remote control of the video conferencing terminal, Touch or Tob interface configuration.

Before the video conferencing terminal is used with a single Mic 500, the HD-VI interface of the video conferencing terminal needs to be connected to the interface marked "IN" of the Mic 500.