---
title: id
framework: nowplaying
role: symbol
role_heading: Instance Property
path: nowplaying/mediadevice/id
---

# id

The unique identifier for this device.

## Declaration

```swift
let id: String
```

## Discussion

Discussion Use a stable, locally unique identifier for this device, such as a serial number hardware address, or persistent device name. The identifier must be consistent across app launches for the same device.