Shanghai kei electronics co., LTD. The main professional design, production of various low frequency transformer, annular transformer, rectifier, inductors, adapter, charger, switching power supply, SMT, vacuum container, vacuum machinery, fitness equipment wiring harness and processing and other products, products have passed CCC, UL, TUV, CE, SAA, PSE, BS and other safety certification, and have certificate of environmental protection (ROSH/SGS). Our company has passed the ISO9001 quality management system certification, and adheres to the tenet of "quality first, credit first", and wholeheartedly provides customers with high-quality products and satisfactory services.