> For the complete documentation index, see [llms.txt](https://bananapi.gitbook.io/bpi-m2-ultra-open-source-single-board-computer/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bananapi.gitbook.io/bpi-m2-ultra-open-source-single-board-computer/chapter1/bpi-m2ultraotginterface.md).

# BPI-M2 Ultra OTG interface

banana pi BPI-M2 Ultra have 1 OTG port on board.