In the fourth edition to our system test series, I decided to go with extremely loud devices, going with all Spectra Alerts! The 4006 system is finally only simplex devices, which brings back the simplex t bar. I’ve also finally made some coding changes, as I have wired the 4006 to trigger a supervisory on the MS-10 as well as gave all the used zones a proper label. As always thank you for watching and I hope y’all enjoy the video!