---
title: HIDUsage.EyeAndHeadTrackersUsage.displaySerialNumber
framework: corehid
role: symbol
role_heading: Case
path: corehid/hidusage/eyeandheadtrackersusage/displayserialnumber
---

# HIDUsage.EyeAndHeadTrackersUsage.displaySerialNumber

## Declaration

```swift
case displaySerialNumber
```