> For the complete documentation index, see [llms.txt](https://docs.sentiance.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sentiance.com/sdk/api-reference/ios/event-timeline/senttimelineevent/sentunknownevent.md).

# SENTUnknownEvent

Represents a duration of the time when the user's mobility state was unknown.

## SENTUnknownEvent API

{% hint style="info" %}
This class extends SENTTimelineEvent. See [SENTTimelineEvent](/sdk/api-reference/ios/event-timeline/senttimelineevent.md) for additional properties and methods.
{% endhint %}

### isEqual

```swift
func isEqual(to unknownEvent: SENTUnknownEvent) -> Bool
```