---
title: IOUSBBOSDescriptor
framework: IOKit
role: pseudoSymbol
platforms: []
path: iokit/usb_h_user-space/iousbbosdescriptor
---

# IOUSBBOSDescriptor

## Declaration

```occ
struct IOUSBBOSDescriptor {
   UInt8 bLength;
   UInt8 bDescriptorType;
   UInt16 wTotalLength;
   UInt8 bNumDeviceCaps;
};
```

## Overview

BOS Descriptor for a USB Device. .

## See Also

### Related Documentation

- [IOUSBBOSDescriptor](../../kernel/iousbbosdescriptor.md)