FIDO2-Certified device enables passwordless authentication directly in the browser. Biometric authentication eases the user experience. Phishing-resistant authenticator protects against password-based attacks. USB, NFC, and bluetooth-enabled to support users' authentication preferences. size: 35mm (49.5 with cable)(L)x35(W)x10.8mm(H). Weight: 11g. Rechargable - 65mAh. USB-C, 4.75 to 5.50 volts. Dust-safe and splashproof.