# Emergency Button
{% hint style="info" %}
You must add the output parameter to your greeting for the emergency button to display.
{% endhint %}
### Output Parameter
```javascript
emergency =
{
"icon" : "bell-ring", // mdi icon name
"color" : "red", // optional
"payload" : "&command=CMD_911" // no user input sent back but rather ctx params
}
```
`icon` is a [mdi icon](https://materialdesignicons.com/) name \
`payload` can contain any request parameters sent back to Teneo once the button is clicked
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