No headphone jack? No problem. You can use your urrent headphones with a smartphone such as the iPhone 7 thanks to High Resolution Technologies’ i-dSp digital Sound processor.
Available exclusively on Amazon.com (http://amzn.to/2c8HyC5), the $69.99 i-dSp works with Lightning connector-equipped iPhones and any headphones with a 3.5 mm plug. Simply plug the headphone cable into the i-dSp and connect the i-dSp to an Apple Lightning to USB Camera Adapter and iPhone.
In addition to providing a ready-made connectivity solution for the millions of headphones out there, the i-dSp is engineered for improved sound quality, thanks to its proprietary digital Sound processing and built-in high-performance headphone amplifier. It can also be used with a compatible iPod or iPad. However, note that the Apple Lightning to USB Camera Adapter is not included with the i-dSp.