---
title: preferredExtension
framework: replaykit
role: symbol
role_heading: Instance Property
path: replaykit/rpsystembroadcastpickerview/preferredextension
---

# preferredExtension

A bundle identifier of a broadcast extension.

## Declaration

```swift
var preferredExtension: String? { get set }
```

## Discussion

Discussion Set this property to the bundle identifier of a broadcast extension to show only that broadcast provider in the broadcast picker. Set the property to nil, which is the default value, to show all broadcast providers available on the device.

## See Also

### Configuring the Broadcast Picker

- [showsMicrophoneButton](replaykit/rpsystembroadcastpickerview/showsmicrophonebutton.md)