---
title: kUSBDeviceReleaseNumber
framework: IOKit
role: symbol
role_heading: Macro
platforms: [Mac Catalyst 13.0+, macOS 10.0+]
path: iokit/kusbdevicereleasenumber
---

# kUSBDeviceReleaseNumber

## Declaration

```occ
#define kUSBDeviceReleaseNumber
```

## Discussion

The field in the USB Device Descriptor corresponding to the device release version