---
title: IOUSBDeviceQualifierDescriptor
framework: IOKit
role: pseudoSymbol
platforms: []
path: iokit/usb_h_user-space/iousbdevicequalifierdescriptor
---

# IOUSBDeviceQualifierDescriptor

## Declaration

```occ
struct IOUSBDeviceQualifierDescriptor {
   UInt8 bLength;
   UInt8 bDescriptorType;
   UInt16 bcdUSB;
   UInt8 bDeviceClass;
   UInt8 bDeviceSubClass;
   UInt8 bDeviceProtocol;
   UInt8 bMaxPacketSize0;
   UInt8 bNumConfigurations;
   UInt8 bReserved;
};
```

## Overview

USB Device Qualifier Descriptor. See the USB Specification at [http://www.usb.org](../../link-1670329.md).

## See Also

### Related Documentation

- [IOUSBDeviceQualifierDescriptor](../../kernel/iousbdevicequalifierdescriptor.md)