SDJ ELECTRONICS CO., LTD is a professional manufacturer and one of the biggest wholesaler that specializes in the research, development and production of security products. Founded in 1998, SDJ ELECTRONICS CO.,LTD specializes in the high quality and cost-efficient production of SECURITY equipments. SDJ covers an area of approximately 5,000 square meters,?with 15 production lines over 500 employees, including over 17 engineering and technical professionals