DONGGUAN HANYANG ELECTRONIC INSTRUMENT CO., LTD is a hi-tech enterprise by R&D , manufacture and production for qualified precise testing apparatus. After founding of company, we have established long term relation by communication and co-operation with international and demestic scientific R&D office and standard testing center and consecutive renovation in products to the same step with international quality level.Kinds of testers are used spreadly in scientific unit, quality inspection lab , college and professional testing agent by testing power supply cord , plug and outlet, home electronic using , switches, metal, plastic and packing etc, supplying professional apparatus for quality control and phisical testing and teaching research. Kinds of testing apparatus are used in worldly creteria as ISO、ASTM、DIN、EN、GB、BS、JIS、UL、IEC、VDE、CCC、CSA、SAA . . . and produce custom oriented apparatus to solve the testing purpose.We insist WIN-WIN principle and quality No. one and customer service to establish lone term partner. please kindly refer to our website: *****