Shandong association digital technology is a high - tech enterprise which integrates the research and development, sales and service of the double - duplex wireless telephone and wireless tally products, and carries on the strategic research centering on the humanized multi-functional product market. The company's core management and technical backbone all come from domestic and international well-known communication technology enterprises, in the mobile radio frequency system, baseband circuit, PCB layout, industrial design ( id ), structural design ( MD ), software design ( SW ), production manufacturing ( Yus products ) test ( te ), quality assurance ( QA ) and other fi...