---
title: bcdUSB
framework: iousbhost
role: symbol
role_heading: Instance Property
path: iousbhost/iousbhostiosourcedescriptors/bcdusb
---

# bcdUSB

The USB version that the device supports.

## Declaration

```swift
var bcdUSB: UInt16
```

## Discussion

Discussion Initialize this descriptor to the USB version that the device supports. Acceptable values are 0x0110, 0x0200, 0x0300, 0x0310.

## See Also

### Descriptors

- [descriptor](iousbhost/iousbhostiosourcedescriptors/descriptor.md)
- [ssCompanionDescriptor](iousbhost/iousbhostiosourcedescriptors/sscompaniondescriptor.md)
- [sspCompanionDescriptor](iousbhost/iousbhostiosourcedescriptors/sspcompaniondescriptor.md)