Shenzhen Usenda Digital Technology Limited Company, also named Tanda Int'l Electronics Limited, is a high-tech enterprise integrating the research and development, production and sales. We are engaged in LCD screens, LCD monitors, advertising players, all-in-one PCs, DID video wall products, etc. Products of our own brand are widely used in highways, railways, civil aviation scheduling command centers, army command centers, oil fields, factories, mines, electric powers, water conservancies, ...