How it was made...............(Please read description) 

Well I thought the video was recorded like it was recorded on a wall or something…

@@The-creator-of-good-videos-15 Thanks for being honest, its hard if it is mounted on a wall.

@@MilesRandall-bq3fd I never said it was US certified. If you would like to send me an American fire sounder, I will gladly video it, until then enjoy our wonderful multi tone fire sounders.

@@MilesRandall-bq3fd No, not at all. It is up to the installer what sound a fire sounder makes, so long as all the sounders in the same building, no one worries.