Summary
The iPhone has a narrow recessed headphone jack which means that a lot of headphones won’t work without an adaptor – the last thing you’d want to happen is to buy an expensive pair of headphones, the ones that you’ve dreamt about, and to find out they don’t fit with your iPhone! This adaptor allows you to purchase any headphones and to use them with your iPhone, so you’re no longer restricted to official iPhone headphones.

Manufacturer's Description
Connect your personal headphones to the iPhone using this headphone adaptor as unofficial headphones may not fit or comply with the iPhone. High quality gold plated connectors.