# TrackingReference

> The InputDevice is an unmoving reference object used to locate and track other objects in the world.

## Definition

* **Type:** Field
* **Namespace:** [UnityEngine.XR](/engine/6000.0/script-reference/unityengine/xr.md)
* **Assembly:** UnityEngine.XRModule

```csharp
TrackingReference = 128
```