The YubiKey 5C NFC FIPS USB-C (140-3) is a security device by Yubico that provides two-factor authentication via NFC and USB-C. It is FIPS 140-3 certified for use in sensitive environments. The device is compatible with both Windows and Mac systems, offering a reliable physical authentication method. The NFC feature allows for contactless use, while the USB-C port ensures fast and convenient connectivity.