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.