The VeriMark Guard USB-A Fingerprint Key - FIDO2, WebAuthn/CTAP2, & FIDO U2F - Cross Platform offers the latest in biometric authentication for any device, regardless of OS. FIDO2 and FIDO U2F certified with expanded authentication options, including strong single-factor (passwordless), dual, multi-factor, and tap-and-go. Maximum compatibility with web services including Google, Facebook, and Microsoft, with support for Chrome, Edge, Firefox, and Safari.