> 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="https://31762434-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-M4NrSugToAwYkW0a8hV%2Fuploads%2F0Fk65lyyaqU8WFnfiQlo%2FFosi%20Audio%20IM4.png?alt=media&amp;token=4e4977e0-f97b-40f6-9fd2-47259f6b4e85" alt=""><figcaption></figcaption></figure>

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