Concerns have been raised by a group of scientists about the possible carcinogenic effects of electromagnetic radiation emitted by modern devices. Of particular concern are wireless headphones like Apple's popular AirPods as they sit in the ear canal exposing fragile tissue to potentially dangerous levels of radiation.
https://www.notebookcheck.net/250-scientists-sign-petition-warning-of-dangers-posed-by-AirPods-other-wireless-devices.413886.0.html