> For the complete documentation index, see [llms.txt](https://emotiv.gitbook.io/insight-manual/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://emotiv.gitbook.io/insight-manual/quick-start/fitting-the-headset.md).

# Fitting the headset

Before fitting your headset, please add primer fluid from the sensor pack onto each of the five sensors and both references. Turn on the headset, ensuring the white LED on the front lights and connect it via BLE or to a USB dongle prior to fitting onto the head.

![Fitting the INSIGHT](https://lh5.googleusercontent.com/-0zG4_ZBjISo9cQ65yV-O4fNylbxneHGRvlgQB1kfIs-elczFGoio8Lwc9B3TGdZLnelTzP7rn2b59-kR2fRJECZQOW6b7tJ1BrnUFyjqG8GWeZpz37zDIL8bHkaL-cGIle0g5OV)

Gently slide the headset onto the head. The reference sensors, which are on the black arm, should make contact with the skin behind the ear. If necessary, gently bend the reference sensor arm so that the sensors make contact with the skin. The frontal sensors should be positioned about three finger widths above the eyebrows. Below are some shots of the placement for Pz, with the three prong gummy slide it back and forth to work the sensors through the hair to make contact with the scalp.\
   

![](/files/-LfNJnSemJ6TVxyIWHTO)

![](/files/-LfNJnSg8CsT-5mn6F2w)


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