Unique fire alarm sound here in Stockton California

So recently the Stockton Fire Department shared a post on Facebook about a fire in the Downtown area. When they were entering the apartment building, at the 31 second mark, you can hear the fire alarm notification device.

The thing is, it is not March Time, Code 3, nor is it slow whoop.

Here’s the video from YouTube from Stockton Fire. Any idea what the temporal pattern is and possibly the make? https://www.youtube.com/watch?v=DJRqsv0zelI

That’s not temporal at all, that’s a multi-tone sounder or sounder/strobe in continuous doing a hi-lo tone. Almost kinda sounds like a European fire sounder, though it probably isn’t as such devices aren’t really seen or used in North America (if at all). It kinda sounds like a System Sensor MASS on hi-lo: System Sensor MASS: 800-1000Hz Alternating (Hi-Lo) - YouTube but it’s a little fast for a MASS.