You can set video intercom volume as required.
Only video intercom devices support this function.
On the device list page, if the page is in list mode, swipe
the device name to the left and tap .
On the device list page, if the page is in thumbnail mode,
tap the device name or tap .
On the Live View page, tap and then tap
Settings.
For details about how to enter the Live View page, see Start and Stop Live View.