What Is The Arlo Pro 2 Three Dot Icon?

[dpimenides]

What does the icon of a circle with 3 horizontal lines mean? It is not included in the manual and I do not think it is motion detection, because there is another icon for this

[TomMac]

In the web access, the motion on is a "running man"

In the apps it's a ball and 3 lines... sort of backwards Philly Hockey logo

[Leopard]

The circle icon is a microphone/ sound icon.
If all sound/microphone/ volume is turned off, it will appear black.