New System Sensor Sounder Bases?

Fire Alarms
1

I was watching this video (where they are installing L-Series LED speaker strobes) and saw a different design of a sounder base. Here’s the video: https://youtu.be/cNDWZVRT9Ec?si=W9FLhAogA-ww4DPC
Any thoughts?

2

I thought I saw a potter logo in there, so these may not be system sensor

3

Those are Potter sounder bases.