The CE mark stands for consumer safety within the European Union. Industrial goods must contain this marking which indicates that it is complying with EU rules for health & safety set out for consumers. The number next to the CE marking indicates the product class. In the case of the iPhone this will be 0682 which means it’s a communication device and corresponds with the regulations set out for selling such a device within the EU. The circle with the exclamation point is called the CE alert mark, again indicating this device can be safely used by EU citizens.