ISO 9001：2015 Quality management system
a worldwide standard that sets requirements for a strong Quality Management System. It details specific processes, procedures and activities that organizations must create, implement, maintain and improve in order to successfully manage making products or delivering services. A third party issues a certificate to help customers have more confidence that the organization has a system in place to meet their requirements.
VDE certification
The VDE Testing and Certification Institute in Offenbach, Germany is a research institute of the German Institute of Electrical Engineers (Verde Deutscher Elektrotechniker, VDE), founded in 1920. As a neutral, independent organization, VDE's laboratories inspect and certify electrical products in accordance with German VDE national standards or European EN standards, or IEC International Electrotechnical Commission standards. In many countries, the VDE certification mark is even more famous than the national certification mark, especially recognized and valued by importers and exporters.