> For the complete documentation index, see [llms.txt](https://itsgreq.gitbook.io/headphone-measurements/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://itsgreq.gitbook.io/headphone-measurements/iems/fosi-audio-im4.md).

# Fosi Audio IM4

<figure><img src="/files/EB5bHy3LMic5Ae5JTHAF" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/app2msg8jj8B1Vi3AWZP" alt=""><figcaption></figcaption></figure>