Why is iphone7 a wired headset?

Because Apple has obtained a brand-new earphone design patent, it can automatically switch between wired and wireless modes.

Now the newly designed iphone 7 cancels the traditional 3.5mm headphone jack. If you want to use wired headphones after purchasing iphone7, you need to use the converter from Lightning to 3.5mm headphone jack, so that we can use ordinary headphones normally.