A microphone for breaking glass. Not conversations.
GlassProtect U recognises the sequence of low-frequency impact and high-frequency breaking sounds. It adds acoustic detection where an opening contact would not identify a broken pane.
Glazing type, curtains, room acoustics, distance and the sound path all affect positioning. Check the exact manual and test the installation. It is not live audio monitoring, a general sound sensor or a detector for every impact on a window.