.. yk5-whats-new.rst .. _yk5-whats-new-label: =========== Connectors =========== The capabilities of any YubiKey 5 Series depends on the combination of firmware + connector type + protocol applied. This section describes connector types (form factors). For YubiKey 5 Series firmware-based capabilities, see :ref:`firmware-label` and :ref:`yk5-apps-label`. .. _yk-fiveci-label: YubiKey 5Ci =========== Like the USB interface, the YubiKey 5Ci's Lightning® interface also uses a variety of channels for communication between the YubiKey and iOS. .. include:: includes/lightning-connector.rst .. _ipad-pro-label: iPad and iPad Pro ----------------- For users of keys in the YubiKey 5 Series, because the iPad Pro does not have a Lightning port, support depends on what you want to do. The second part of this article covers all those aspects: `Can I use my YubiKey with iPads? `_ From the developer perspective, support for the iPad Pro has some limitations. Consult `Supporting U2F or FIDO2 Security Keys on iOS or iPadOS | Security Key Compatibility `_ for detailed instructions on working around those limitations. NFC === For quick tap-n-go authentication across desktops, laptops, and mobile devices, all of the applications - including :ref:`fido-two-label` - are available over NFC. `Background tag reading `_ is supported in the iPhone XS and newer. .. include:: includes/nfc-interface.rst USB === All of the models in the YubiKey 5 Series provide a USB 2.0 interface, regardless of the form factor of the USB connector. The YubiKey presents itself as a USB composite device in addition to each individual USB interface. The USB PID and iProduct string changes depending on which of the USB interfaces are enabled. They are described in the `YubiKey USB ID Values guide `_. See also :ref:`yk5-usb-interfaces-label`. ---- Click for `Yubico Support `_.