The DP400 instrument-specific digital readout developed by Sinowon is favored by foreign professional instrument refurbishers with beautiful appearance design, good human-machine interface, and powerful geometry size computing capabilities. At present, DP400 has been exported to Germany, Italy, Canada, Argentina, Singapore, Malaysia, Thailand and other countries and regions, and it is used to refurbish the optical inspection instruments such as tool microscopes, measuring projectors, optical com