**Brand New Not Opened**The YubiKey 5 NFC is a black security key and passkey designed for multi-factor authentication (MFA). It has a USB-A NFC size and is compatible with Windows, Mac OS, and Linux devices. The YubiKey 5 NFC is a durable device with additional features such as being crush-resistant, fitting on a keychain, and utilizing near-field communication (NFC) technology. It comes with a 1-year manufacturer's limited warranty and is a lightweight, weighing only 0.1 ounces. The YubiKey 5 NFC is a versatile and reliable tool for enhancing the security of your devices and data.