# GvrHeadset prefab

# GvrHeadset prefab

Required to access positional tracking features for Daydream Standalone headsets. Ensures that the [`GvrHeadset`](https://developers.google.com/vr/reference/unity/class/GvrHeadset) API is available to your app.

Only one instance of this prefab is allowed in the scene. Additional instances are automatically destroyed.

## Prefab Hierarchy

| Game object name | Description |
|---|---|
| [`GvrHeadset`](https://developers.google.com/vr/reference/unity/prefab/GvrHeadset#GvrHeadset_object) | Holds the [`GvrHeadset`](https://developers.google.com/vr/reference/unity/class/GvrHeadset) API singleton. Provides static methods to determine whether positional tracking is supported, size and shape of the safety cycliner, and estimated floor height. |

## GvrHeadset game object

Holds the [`GvrHeadset`](https://developers.google.com/vr/reference/unity/class/GvrHeadset) API singleton. Provides static methods to determine whether positional tracking is supported, size and shape of the safety cycliner, and estimated floor height.

Components:

[GvrHeadset](https://developers.google.com/vr/reference/unity/class/GvrHeadset),


[UnityEngine.Transform](https://docs.unity3d.com/Manual/class-Transform.html)