---
title: IOUSBDeviceDescriptor
framework: IOKit
role: pseudoSymbol
path: iokit/usb_h_user-space/iousbdevicedescriptor
---

# IOUSBDeviceDescriptor

## Declaration

```occ
struct IOUSBDeviceDescriptor {
   UInt8 bLength;
   UInt8 bDescriptorType;
   UInt16 bcdUSB;
   UInt8 bDeviceClass;
   UInt8 bDeviceSubClass;
   UInt8 bDeviceProtocol;
   UInt8 bMaxPacketSize0;
   UInt16 idVendor;
   UInt16 idProduct;
   UInt16 bcdDevice;
   UInt8 iManufacturer;
   UInt8 iProduct;
   UInt8 iSerialNumber;
   UInt8 bNumConfigurations;
};
```

## Overview

Overview Descriptor for a USB Device. See the USB Specification at http://www.usb.org.

## See Also

### Related Documentation

- [IOUSBDeviceDescriptor](kernel/iousbdevicedescriptor.md)