> For the complete documentation index, see [llms.txt](https://docs.mixeffect.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mixeffect.app/automate/osc/messages/counter-overlay.md).

# Counter Overlay

The Counter Overlay is a feature of the following ATEM switchers:

* ATEM 1 M/E Constellation HD
* ATEM 2 M/E Constellation HD
* ATEM 4 M/E Constellation HD

It displays a countdown or countup clock on Output 1.