---
title: interfaceNumber
framework: iousbhost
role: symbol
role_heading: Type Property
path: iousbhost/iousbhostmatchingpropertykey/interfacenumber
---

# interfaceNumber

The matching property for the device’s interface number.

## Declaration

```swift
static let interfaceNumber: IOUSBHostMatchingPropertyKey
```

## See Also

### Interface Properties

- [interfaceClass](iousbhost/iousbhostmatchingpropertykey/interfaceclass.md)
- [interfaceSubClass](iousbhost/iousbhostmatchingpropertykey/interfacesubclass.md)
- [interfaceProtocol](iousbhost/iousbhostmatchingpropertykey/interfaceprotocol.md)