Qingdao YESDO Electronic Co., LTD£¬ established in 1998, is a technological innovation enterprise based on computer testing technology. We have a professional R&D group led by a chief designer for the first set of Intelligent Safety Tester in China; we have manufacturing & quality control system established by experts of military industry who has experience for many years; upon the business philosophy of ¡°Professional quality, the only target¡± , we win a broad customer respect and trust in the market. We have established the quality control system according to the ISO9000 and passed the certification of ISO9001-2000 Quality System£» All the managers have years of management experience in the line, with advanced product technology, specialized in developing the domestic testing market, they make great efforts to provide high quality of safety tester¡¢AC power supply and other professional tester equipments to offer efficient customer service to create the new brand of the domestic professional testing apparatus.