---
title: uniqueIdentifier
framework: homekit
role: symbol
role_heading: Instance Property
path: homekit/hmcharacteristic/uniqueidentifier
---

# uniqueIdentifier

A unique identifier for the characteristic.

## Declaration

```swift
var uniqueIdentifier: UUID { get }
```

## See Also

### Identifying a characteristic

- [localizedDescription](homekit/hmcharacteristic/localizeddescription.md)