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# IOUSB20HubDescriptor

A structure that defines the descriptor for a USB hub.

```
struct IOUSB20HubDescriptor;
```

## Overview

For more information about this descriptor type, see section 11.23.2.1 of the USB 2.0 specification at <http://www.usb.org>.

## Topics

### Accessing the Descriptor Properties

[`bLength`](/documentation/USBDriverKit/IOUSB20HubDescriptor/bLength)

[`bDescriptorType`](/documentation/USBDriverKit/IOUSB20HubDescriptor/bDescriptorType)

[`bNumberPorts`](/documentation/USBDriverKit/IOUSB20HubDescriptor/bNumberPorts)

[`wHubCharacteristics`](/documentation/USBDriverKit/IOUSB20HubDescriptor/wHubCharacteristics)

[`bPowerOnToPowerGood`](/documentation/USBDriverKit/IOUSB20HubDescriptor/bPowerOnToPowerGood)

[`bHubControllerCurrent`](/documentation/USBDriverKit/IOUSB20HubDescriptor/bHubControllerCurrent)

[`deviceRemovable`](/documentation/USBDriverKit/IOUSB20HubDescriptor/deviceRemovable)

[`reserved`](/documentation/USBDriverKit/IOUSB20HubDescriptor/reserved)


---

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