Hongfa is the first largest relay manufacturer in China and one of the leading relay manufacturers and suppliers in the world.We have a full set of quality assurance systems including ISO9001,ISO/TS16949,ISO14001,OHSAS18001,GJB9001A, and IECQ QC 080000.We have also been honorably awarded High Quality Product Exempt from National Inspection.Moreover,our products are UL&CUL,VDE,TÜV and CQC approved.