There should be a feature on VP-200 that turns off the sound. Same thing turn off video too.
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I have found the information. You notice the bottom of the remote control, there is button says "no calls" on the left side of that button, there is icon looks like microphone, that is to turn on or off speaker, the button on the right side of that "No call" button, which looks like camera. That is to turn off or block somebody from view your video.
Get it?
