We installation cameras with built-in microphones and audio system for gatehouses, supply facets, and traveler management.

https://wiki-saloon.win/index.php/From_Wired_to_Wireless:_A_Total_Guide_to_Choosing_and_Setting_Up_the_Right_Security_Camera_System

We set up cameras with integrated microphones and audio system for gatehouses, beginning factors, and traveller control.