Basic information of CE certification Mandatory or not: mandatory + self-declaration Certificate validity period: no validity period Factory inspection requirements: no requirements Certificate holder requirements: no requirements Technical information: voltage frequency AC 230V, 50Hz /60Hz, plug European standard CEE 7/7 & 7/16 or national standard CE mandatory certification and CE self-declaration instructions The vast majority of products can be affixed with the CE mark if the manufacturer adopts a self-declaration of conformity; some products with relatively higher risks need to be assessed by a third-party agency authorized by the EU, that is, the Notified Body. The CE mark can be affixed.