Hi
When using electronic accessories with your iPhone, ensure that they are either genuine Apple products or that they have been certified as Made for iPhone under the MFi program. Certified items come with the "Made for iPhone" logo on them and/or on their packaging.
Using uncertified or counterfeit accessories may damage your iPhone and/or adversely affect operation. Apple's warranty does not cover damage caused by use with a third party product that does not meet Apple's specifications.
More information:
About iPhone, iPad, and iPod accessories - Apple Support
Identify counterfeit or uncertified Lightning connector accessories - Apple Support