> For the complete documentation index, see [llms.txt](https://docs.senstream.com/senstream-researcher-ring-application-user-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.senstream.com/senstream-researcher-ring-application-user-guide/senstream-research-ring/senstream-research-ring-overview.md).

# Senstream Research Ring Overview

### Included Hardware

The Senstream Ring comes with a USB charging cable and ring sizing shims (6-13)

<figure><img src="/files/Bu3BApdIk1BAvokLRSZG" alt=""><figcaption></figcaption></figure>

### Sensor Locations

The Senstream ring contains:

* 3 ECG electrodes (2 inner, 1 outer)
* 2 EDA electrodes
* Optical PPG sensor.

<figure><img src="/files/SIR1x1xMfnX91BWmHNbI" alt=""><figcaption></figcaption></figure>

### Dimensions

<figure><img src="/files/Jq7hqBO6KLeLiNk6GdKo" alt=""><figcaption></figcaption></figure>