# Checking Contact Quality

For Think2Switch™ to effectively read your brain signals, the headset must have good contact with the head.

You can use the **Contact Quality Map** on the Contact Tab to check the contact quality.  Try to get all four contacts to be <mark style="color:green;">**green**</mark> (100%).

### Great/Good Contact Quality

All contacts are green. This is what you want to achieve. A checkmark will appear, telling you whether you are good to move onto calibration.&#x20;

<figure><img src="/files/TWAuTseukhVYPvcqFidh" alt="" width="188"><figcaption></figcaption></figure>

If a contact is yellow, but still shows a green checkmark, this indicates that the contacts can still read your brain signals accordingly. This is still very good .&#x20;

<figure><img src="/files/WLRChuTEAVqDD2TsSUiJ" alt="" width="188"><figcaption></figcaption></figure>

### Poor Contact Quality

If there are yellow/red contacts or all are red and there is no green checkmark, click [here](/think2switch-knowledge-guide/think2switch-2.5/before-you-get-started/how-to-setup-the-muse-headset.md) to readjust the headset for better contact quality as the headset is not fitted properly.&#x20;

<figure><img src="/files/0lGo9H60Ob1sjPukRlAd" alt="" width="188"><figcaption></figcaption></figure>

<figure><img src="/files/3e97ebbJncG8G2Cq3Bat" alt="" width="188"><figcaption></figcaption></figure>


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