258 Keysig ht N9923-90001 User’s GuideSafety ConsiderationsPackaging MarkingsPackaging MarkingsAC/DC Adapter MarkingsThis symbol on all primary and secondary packaging indicates compliance toChina standard GB 18455–2001.The UL Marks are registered certification marks of Underwriters Laboratories Inc.(UL). It means that UL has tested and evaluated representative samples of thatproduct and determined that it meets UL's safety requirements. Whenaccompanied by a 'C' and 'US', it indicates compliance to both Canadian and USrequirements.NOM Mark (Normality of Mexico) indicates that the product was tested by anaccredited laboratory in Mexico and meets Mexico’s safety requirements.Japan’s safety and EMC compliance mark.China’s safety and EMC compliance mark.Taiwan’s safety and EMC compliance mark.Singapore’s safety mark.Korea’s safety and EMC mark.GOST, Russia’s safety and EMC mark.