---
title: bNumDeviceCaps
framework: usbdriverkit
role: symbol
role_heading: Instance Property
path: usbdriverkit/iousbbosdescriptor/bnumdevicecaps
---

# bNumDeviceCaps

The number of separate device capability descriptors in the binary object store.

## Declaration

```occ
uint8_t bNumDeviceCaps;
```

## See Also

### Accessing the Descriptor Properties

- [bLength](usbdriverkit/iousbbosdescriptor/blength.md)
- [bDescriptorType](usbdriverkit/iousbbosdescriptor/bdescriptortype.md)
- [wTotalLength](usbdriverkit/iousbbosdescriptor/wtotallength.md)