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# UISupportedExternalAccessoryProtocols

The protocols that the app uses to communicate with external accessory hardware.

## Discussion

Add this key to your app’s `Info.plist` file, and set the value to the names of the hardware protocols your app supports. You format protocol names as reverse-DNS strings. For example, the string “`com.apple.myProtocol`” might represent a custom protocol that Apple defines. Manufacturers can define custom protocols for their accessories or work with other manufacturers and organizations to define standard protocols for different accessory types.

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