Take a good look at this Fire Strobe horn . No Markings no UL or other 3rd party listing its a cheap knock off sold on Amazon and Alibaba and other sites
these units do not function properly can damage a fire alarm and are not to be sold in USA but yet they are popping up all over the place . Because unscrupulous building owners are cutting corners and having there handymen do the work instead of alarm company s
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