2-in-1 Lightning to Headphone Jack Charging Cable:...

2-in-1 Lightning to Headphone Jack Charging Cable: 3-Pack for my iPhone 7. They don t work. I receive an error message *This accessory is not supported by this iPhone* on my phone each and every time I have attempted to use any of them. Why? If they are not supported by Apple iPhone 7, which iPhone does support them? If they are not supported by any iPhone, why are you selling them? Refund me now.