> For the complete documentation index, see [llms.txt](https://docs.v2raytun.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.v2raytun.com/overview/device-limit.md).

# Device limit

v2RayTun since version 2.3.5 supports passing headers to limit the number of devices on a single subscription.

* X-HWID
* X-Device-OS
* X-Ver-OS
* X-Device-Model
* X-App-Version

This header format was first established in [Remnawave](https://remna.st/)

<figure><img src="https://2902213438-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FHZ5CDbK0xvmrJLip522s%2Fuploads%2F7jwyAXo5cnMuXyBlS36j%2Fimage.png?alt=media&amp;token=7bbab4c3-d6b0-42d2-9e10-b9da4f409b7a" alt=""><figcaption><p>Example</p></figcaption></figure>

## Supported panels:

* [Remnawave](https://remna.st)