AC power cord is the main product at the time when Lih Tzu established. Many certifications of different countries' strandard are applied as listed left.

Every country/region, in accordance with their volatge frequency, have set up their own AC power cord cable, plug and sockets' standards.

Since AC power cord's quality has a significant influence on civilian's safety of electricity usage, most nations have issued their own electricity safety standards. Not many of them are the same. It means, if you wish to introduce certain products into certain country, your products have to pass their specific quality standard, either cable, plug or sockets.

As to other electronic appliances, such as computeríK.., are under the regulation of IEC 320 standard. But, the mating cable, plug and socket, still, have to meet their specific quality standard in order to import to this country.