---
title: interfaceProtocol
framework: iousbhost
role: symbol
role_heading: Type Property
path: iousbhost/iousbhostmatchingpropertykey/interfaceprotocol
---

# interfaceProtocol

The matching property for the interface’s protocol.

## Declaration

```swift
static let interfaceProtocol: IOUSBHostMatchingPropertyKey
```

## See Also

### Interface Properties

- [interfaceNumber](iousbhost/iousbhostmatchingpropertykey/interfacenumber.md)
- [interfaceClass](iousbhost/iousbhostmatchingpropertykey/interfaceclass.md)
- [interfaceSubClass](iousbhost/iousbhostmatchingpropertykey/interfacesubclass.md)