https://www.cnet.com/news/rumored-xbox-accessibility-controller-leaks-on-twitter/

Windows Central believes the device is "a new Xbox controller designed for accessibility" that Microsoft has been working on for a while, and speculates that it will be announced at the E3 gaming show, which takes place just a few weeks from now in Los Angeles.

As the site points out, it has a grooved section on type for functions, a USB port and a 3.5mm audio jack.