# Extender Details

The Extender has been designed to be small enough to fit into the pocket of a shirt or attached to a lanyard. It features two USB ports which are electrically isolated to connect to a headset and your computer. When connected the headset should be visible in in all EMOTIV software. It features one button for both power on/off and recording start/stop functionality. A microSD card slot is located on the side to allow users to fit a card to store recordings for offline analysis.

There is a hardware trigger input utilizing a 2.5mm audio socket pictured below.

![](https://lh3.googleusercontent.com/aPk1UehV4UdSLISsZlZ_FdtJL4-bGmvUCHM5cpL7sDM6uCtcEIhNU674CejCkSn88CHEmaNmmBJsWV6GtOs3zr26Xtg3HjTkNS1cZE6DYfBcdv-yeBHLQzBzQmtUVBQxQnM3cm8G)


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://emotiv.gitbook.io/extender-manual/getting_started.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.