# isDeviceActive

> Read-only value that can be used to determine if the XR device is active.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine.XR](/engine/6000.7/script-reference/unityengine/xr.md)
* **Assembly:** UnityEngine.XRModule

```csharp
public static bool isDeviceActive { get; }
```

### Remarks

When true, Unity accepts input from the device and attempts to render to the device's display or displays. Note that this returns true even if the device isn't currently rendering due to lack of user presence (refer to [\_userPresence](/engine/6000.7/script-reference/unityengine/xr/commonusages/userpresence.md)). This can become false if a device is disconnected, wasn't initialized (refer to [SubsystemManager](/engine/6000.7/script-reference/unityengine/subsystemmanager.md) to find a display subsystem descriptor and create the subsystem from it), or the XR display subsystem is stopped.

XR output is automatically mirrored to the main display (if applicable).  This can be controlled with [\_showDeviceView](/engine/6000.7/script-reference/unityengine/xr/xrsettings/showdeviceview.md).

The main window is still controlled by [Screen](/engine/6000.7/script-reference/unityengine/screen.md) and related APIs.