Question about Arlo VMS3430 set of 4

Unless I am mistaken, the VMC3030 camera has no sound!
It is only from the PRO version that there is a microphone and a speaker integrated (with the function "Intelligent alarm 100 decibels") !

See details on the ARLO website:
Version VMC3030 :
https://www.arlo.com/fr...

PRO version
https://www.arlo.com/fr...
Two-way sound
Smart alarm