---
title: bDescriptorType
framework: usbdriverkit
role: symbol
role_heading: Instance Property
path: usbdriverkit/iousbbosdescriptor/bdescriptortype
---

# bDescriptorType

The type of the descriptor.

## Declaration

```occ
uint8_t bDescriptorType;
```

## Discussion

Discussion The value in this field is always kIOUSBDescriptorTypeBOS.

## See Also

### Accessing the Descriptor Properties

- [bLength](usbdriverkit/iousbbosdescriptor/blength.md)
- [wTotalLength](usbdriverkit/iousbbosdescriptor/wtotallength.md)
- [bNumDeviceCaps](usbdriverkit/iousbbosdescriptor/bnumdevicecaps.md)