---
title: bNumInterfaces
framework: usbdriverkit
role: symbol
role_heading: Instance Property
path: usbdriverkit/iousbconfigurationdescriptor/bnuminterfaces
---

# bNumInterfaces

The number of interfaces this configuration supports.

## Declaration

```occ
uint8_t bNumInterfaces;
```

## See Also

### Getting the Descriptor Properties

- [bLength](usbdriverkit/iousbconfigurationdescriptor/blength.md)
- [bDescriptorType](usbdriverkit/iousbconfigurationdescriptor/bdescriptortype.md)
- [wTotalLength](usbdriverkit/iousbconfigurationdescriptor/wtotallength.md)
- [bConfigurationValue](usbdriverkit/iousbconfigurationdescriptor/bconfigurationvalue.md)
- [iConfiguration](usbdriverkit/iousbconfigurationdescriptor/iconfiguration.md)
- [bmAttributes](usbdriverkit/iousbconfigurationdescriptor/bmattributes.md)
- [MaxPower](usbdriverkit/iousbconfigurationdescriptor/maxpower.md)