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# deviceUID

The Unique Identifier (UID) of the Bluetooth headphone device providing IMU sensor data for head tracking.

```
var deviceUID: String? { get }
```

## Discussion

The UID identifies which Bluetooth headphone device corresponds to this instance of the
Audio Unit. The host sets this property when it matches a device with this instance of
the Audio Unit.

The Audio Unit should monitor this property to detect when the host matches the Audio Unit with
Bluetooth headphones.

This property supports Key-Value Observing (KVO).

---

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