Physical Attributes

The YubiKey Bio - FIDO Edition is available in the USB-A format, while the YubiKey C Bio - FIDO Edition is available in the USB-C format, both with a maximum transfer rate of 12 Mbps.

The sensors and LEDs behave the same way in both formats.

YubiKey Bio - FIDO Edition

YubiKey Bio - FIDO Edition

YubiKey C Bio - FIDO Edition

YubiKey C Bio - FIDO Edition


The YubiKey Bio recognizes two interactions, one a touch, and the other a fingerprint. Its recognition of the fingerprint - or lack thereof - is communicated through the LEDs (see LED Behavior).

On the YubiKey Bio, the silver-colored bezel encircling the fingerprint sensor provides the grounding plane required to read the fingerprint.

Biometric Touch:
 When prompted to have the YubiKey Bio read your fingerprint from the fingerprint sensor, be sure to touch at least a tiny part of the ring. If you use your little finger to touch only the center of the fingerprint sensor, the key will not read the fingerprint.
Plain Touch:When prompted to touch the YubiKey Bio but not explicitly asked for the fingerprint, touch both the bezel and the fingerprint sensor, even though the fingerprint will not be read.

Tips provides detailed instructions on using the fingerprint sensor.


The YubiKey Bio has a green LED and an amber LED to provide direct feedback, flashing when the key is ready for interaction or communicating something about the interaction. LED Behavior provides detailed descriptions.


The YubiKey Bio has been IP68-rated under the IEC standard 60529.

Care and Cleaning

To clean the YubiKey and sensor, use only wipes impregnated with no more than 70% isopropyl alcohol.

Operational Data

  • Dimensions
    • YubiKey A Bio: 18mm x 45mm x 3.35mm
    • YubiKey C Bio: 18mm x 45mm x 3.75mm
  • Weight: YubiKey Bio A: 4.5g; YubiKey Bio C: 5.0g
  • Operating Temperatures: 0 °C - 40 °C (32 °F - 104 °F)
  • Storage Temperatures: -20 °C - 85 °C (-4 °F - 185 °F)

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