The CB system is a set of global mutual recognition systems for electronic products established by IECEE (The International   Electrotechnical Commission's Electrotechnical Products Qualification Testing and Certification Organization, the English      name The IEC System for Conformity Testing and Certification   of Electrical Equipment). The system participates in members of the CB system. Countries mutually recognize the test results to obtain national certification or approval, thus promoting     international trade. Most of the electronic and electrical products need to meet different regulations and industry requirements when they enter the markets of various countries. In the past, it was a difficult and time-consuming and costly process to obtain product safety registration or safety certification in various countries.  But now relying on the CB system, this situation will never happen again. The CB system is a very convenient procedure. Participating countries can mutually recognize each   other's test results and usually do not need additional tests.