Amazon.com: Yubico FIDO Security Key NFC - Two Factor Authentication USB and NFC Security Key, Fits USB-A Ports and Works with Supported NFC Mobile Devices – FIDO U2F and FIDO2 Certified -
Thetis FIDO U2F Security Key, USB-A, with Aluminum Folding Design, Support U2F Protocol - Walmart.com
Testing FIDO Security Keys (Feitian) with iOS/Android devices
Amazon.com: Yubico Security Key - Two Factor Authentication USB Security Key, Fits USB-A Ports - Protect Your Online Accounts with More Than a Password, FIDO Certified USB Password Key : Electronics