That’s funny; I remember when twoplyboy had various Canadian fire alarm field testing videos on YouTube, one of them showed a Simplex 4010 system with the classic SpectrAlerts! It was in a school, though. As I may have said, I find it quite odd to see System Sensor signals used on Simplex systems, compared to Notifier systems, where it looks a bit more “normal.” And at least they were able to easily keep the classic SpectrAlerts, due to Notifier and System Sensor both being owned by Honeywell.