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# NSSpeechSynthesizer.SpeechPropertyKey.SynthesizerInfoKey

Keys for the speech synthesizier information.

```
struct SynthesizerInfoKey
```

## Discussion

Use constants as keys for the [`synthesizerInfo`](/documentation/AppKit/NSSpeechSynthesizer/SpeechPropertyKey/synthesizerInfo) dictionary.

## Topics

### Synthesizer Info Keys

[`identifier`](/documentation/AppKit/NSSpeechSynthesizer/SpeechPropertyKey/SynthesizerInfoKey/identifier)

The identifier of the speech synthesizer.

[`version`](/documentation/AppKit/NSSpeechSynthesizer/SpeechPropertyKey/SynthesizerInfoKey/version)

The version of the speech synthesizer.


---

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