---
title: IOUSBDeviceCapabilityUSB2Extension
framework: usbdriverkit
role: symbol
role_heading: Structure
path: usbdriverkit/iousbdevicecapabilityusb2extension
---

# IOUSBDeviceCapabilityUSB2Extension

The structure for the USB 2 extension device capability.

## Declaration

```occ
struct IOUSBDeviceCapabilityUSB2Extension;
```

## Overview

Overview See USB 3.0 9.6.2.1: USB 2.0 Extension.

## Topics

### Accessing the Descriptor Properties

- [bLength](usbdriverkit/iousbdevicecapabilityusb2extension/blength.md)
- [bDescriptorType](usbdriverkit/iousbdevicecapabilityusb2extension/bdescriptortype.md)
- [bDevCapabilityType](usbdriverkit/iousbdevicecapabilityusb2extension/bdevcapabilitytype.md)
- [bmAttributes](usbdriverkit/iousbdevicecapabilityusb2extension/bmattributes.md)

## See Also

### Capability Descriptors

- [IOUSBBOSDescriptor](usbdriverkit/iousbbosdescriptor.md)
- [IOUSBDeviceCapabilityDescriptorHeader](usbdriverkit/iousbdevicecapabilitydescriptorheader.md)
- [IOUSBDeviceCapabilityBillboard](usbdriverkit/iousbdevicecapabilitybillboard.md)
- [IOUSBDeviceCapabilityBillboardAltConfig](usbdriverkit/iousbdevicecapabilitybillboardaltconfig.md)
- [IOUSBDeviceCapabilityBillboardAltConfigCompatibility](usbdriverkit/iousbdevicecapabilitybillboardaltconfigcompatibility.md)
- [IOUSBDeviceCapabilityBillboardAltMode](usbdriverkit/iousbdevicecapabilitybillboardaltmode.md)
- [IOUSBDeviceCapabilityContainerID](usbdriverkit/iousbdevicecapabilitycontainerid.md)
- [IOUSBDeviceCapabilitySuperSpeedUSB](usbdriverkit/iousbdevicecapabilitysuperspeedusb.md)
- [IOUSBDeviceCapabilitySuperSpeedPlusUSB](usbdriverkit/iousbdevicecapabilitysuperspeedplususb.md)
- [IOUSBPlatformCapabilityDescriptor](usbdriverkit/iousbplatformcapabilitydescriptor.md)
- [tIOUSBDeviceCapabilityType](usbdriverkit/tiousbdevicecapabilitytype.md)
- [SuperSpeed Device Capabilities](usbdriverkit/superspeed_device_capabilities-enum.md)
- [SuperSpeedPlus Device Capabilities](usbdriverkit/superspeedplus_device_capabiliti-enum.md)