# Positioning the FLEX Controller

There are two places on the FLEX Cap to position the FLEX controller — at the top (Cz) or  the rear (lz). See the images below. 

If you’re doing a sleep study or your participant needs a headrest (e.g., they use a wheelchair), we recommend positioning the FLEX Controller at the top of the FLEX Cap. 

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![](https://lh7-us.googleusercontent.com/xS-oh9g7o-MvlvwkJlUK-kIIolbB_IQJVZXBjJPFs6FF_4mSWBpxb2e1VIIeUfba9yOTsmFSGLdkuU8id4H5X2zdnyigAdMFP1e9S2CRJcY4tk5_yAao_ql1pSMQ4EIwh7yKaS8tBdKooB_cje5Eruk)

### How to Fit the FLEX Controller

1. Choose the position you want the FLEX Controller to be in. 
2. Place the FLEX Controller in the pocket with the EMOTIV logo facing you. 
3. Stretch the Flex Cap fabric over the FLEX Controller and around the edge of the EMOTIV logo (the circle). 
4. The FLEX controller is now secured into place and ready to be used.  

![](https://lh7-us.googleusercontent.com/_znuNYQR_8NdSb79Q9QZAAnAWr1xl1t7kODUgYzphyD8bEOcXEqa1AICM-oJ464n_jZ-xtKSnP_cIEMewQpGfLkYFIFU3Bg3e5WshXDWy4_zzJ2pT7YPPc3008pjU9mCV2gd6wob0zRXr5xJ37RkmuU)