# Undefined

> The system bars behavior is undefined, for example, when running on unsupported Android versions, API 29 or earlier.

## Definition

* **Type:** Field
* **Namespace:** [UnityEngine.Android](/engine/6000.6/script-reference/unityengine/android.md)
* **Assembly:** UnityEngine.AndroidJNIModule

```csharp
Undefined = -1
```