That means users think it's working when it may not be. The PERS transmitters can be worn around the neck, on the wrist, or as a belt clip.
You can find out if your unit is being recalled and to get a free replacement here: http://www.cpsc.gov/en/Recalls/2014/Linear-Expands-Recall-of-Personal-Emergency-Reporting-System-Transmitters/#remedy
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