It seems kind of cool to me, but what the heck is a "personal alarm"? Wouldn't a whistle be a highly effective, low-tech alternative? That just seemed silly to me. It seems to be tailored to the individual building that it is in (evacuation routes, etc. ), that is good I guess. But since it is sealed, then the expired materials cannot be replaced, necessitating replacement of the whole thing, and that is expensive I assume. It can withstand heat and flame, that is good. Not great, but I think it is a step in the right direction for employees' safety.