This supplemental report is being submitted to provide additional information.The subject devices have not been returned to omsc.Omsc reviewed the manufacturing history (dhr) of the subject device and confirmed no irregularity.Four days after delivery, it was found that there was a crack on the edge of the top cover.It is presumed to be the cause of the damage, but it is thought that it is due to the contact of some hard object with the end.It is highly probable that some kind of contact occurred during the process from factory shipment to the time of user discovery, resulting in damage.If additional information becomes available, this report will be supplemented.
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