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# init(deviceMatchingDictionary:)

Initializes a criteria object using a USB device matching dictionary.

```
init?(deviceMatchingDictionary dictionary: [String : any Sendable])
```

## Parameters

`dictionary`

The matching dictionary containing USB device properties.

## Discussion

Use <doc://com.apple.documentation/documentation/IOUSBHost/IOUSBHostDevice/createMatchingDictionaryWithVendorID:productID:bcdDevice:deviceClass:deviceSubclass:deviceProtocol:speed:productIDArray:> to create such a matching dictionary.

See <doc://com.apple.documentation/documentation/iokit/iotypes_h_user-space> in <doc://com.apple.documentation/documentation/iokit> for more details about dictionary keys for the USB device properties.

---

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