Electromagnetic Compatibility Directive (EMC Directive), numbered 2014/30/EU, is a regulation of the European Union. This directive stipulates the electromagnetic compatibility requirements that all electrical and electronic equipment sold in the EU market must meet. Electromagnetic compatibility refers to the ability of equipment to operate normally in its electromagnetic environment without causing unacceptable electromagnetic interference to any other equipment in that environment. In short, the purpose of the EMC Directive is to ensure that electronic devices neither emit excessive electromagnetic interference nor are susceptible to a certain level of external electromagnetic interference, thereby being able to operate normally in the intended environment. The EMC Directive requires manufacturers to conduct a series of tests on their products to assess whether the electromagnetic interference emitted by the products is within the permissible range and whether the products have sufficient resistance to external interference. If the products pass these tests, manufacturers need to declare that the products comply with the requirements of the EMC Directive and mark the CE symbol on the products to be sold in the EU market. For devices involving wireless signal transmission or reception, compliance with the EMC Directive is particularly important because these devices may affect the normal operation of wireless communication networks. By complying with the EMC Directive, manufacturers can ensure that their products do not cause interference to other devices and can maintain stable performance in changing electromagnetic environments. Regulation directive text and harmonized standards: https://single-market-economy.ec.europa.eu/single-market/european-standards/harmonised-standards/electromagnetic-compatibility-emc_en