Is yubico setup for one fingerprint or two? If one, what happens when finger is cut or burned on grill?

Yubico not support fingerprints. It is use for accept human presence. So if you insert yubico in pc or use nfc on smartphone. You can add "required touch" for every authentication operation. Touch approve that it is operation accept by real people. There is not a zero chance, if you do not confirm the action with a touch, then the attacker can use your yubico without your knowledge when you left it in the computer. This mechanism is designed to protect against such attacks.

This is an extremely common device. Why are there only 17 reviews, and even fewer for other Yubico devices?

Likely because people value convenience over security, and this is a secure device. Also, the bad reviews that I've scanned come from people who simply do not understand what multi-factor access means. This device augments your username and password (that which you KNOW) with the device itself (that which you HAVE). When used correctly, if your password is compromised it does an attacker no good unless they have the device as well. for myself, I used separate passwords for various purposes, so a single breach will not place at risk my other accounts. And most are not protected by MFA, since thet are trivial. But for VPN access into my home, and finance accounts, I do use hardware based MFA. A small price to pay for the added protection when there are significant consequences to a single breach.

can a pair of these be set up so one can be used as an emergency backup if the first one is lost?

If you are buying this, you should buy two. Yes, using a second one as a backup is exactly what you want to do. Otherwise, if the first gets lost or broken, you are locked out of the accounts you set up.

Can you use this to auto-fill your passwords so you don't have to remember any?

The YubiKey 5 is a FIDO2-capable key - which does replace password usage in many applications. From the FIDO Alliance website: "FIDO2 cryptographic login credentials are unique across every website, never leave the user’s device and are never stored on a server. This security model eliminates the risks of phishing, all forms of password theft and replay attacks."

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Yubico - YubiKey 5 NFC - Two-Factor authentication (2FA) Security Key, Connect via USB-A or NFC, FIDO Certified - Protect Your Online Accounts

Yubico - YubiKey 5 NFC - Two-Factor authentication (2FA) Security Key, Connect via USB-A or NFC, FIDO Certified - Protect Your Online Accounts

Product ID: 101807037

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Brand
Yubico
Hardware Interface
USB 2.0
Special Feature
Dust Proof
Connectivity Technology
NFC USB
Color
Black

💧Water & Crush Resistant Durability

🔌Dual USB-A & NFC Connectivity

🔐FIDO2 Certified Security

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Description

🔑 Unlock elite-level security with effortless style.

BUILT TO ENDURE - Rugged design resists water, crushing, and tampering—no batteries or network needed.
PLUG TAP CONVENIENCE - Authenticate instantly via USB-A or NFC—security that moves with your lifestyle.
BACKUP YOUR DIGITAL LIFE - Register a secondary YubiKey to avoid lockouts and stay in control, always.
FUTURE PROOF YOUR ACCESS - Supports FIDO2, OATH-TOTP, Smart Card (PIV), and OpenPGP for versatile, cutting-edge 2FA.
SEAMLESS MULTI PROTOCOL SUPPORT - Works flawlessly with Google, Microsoft, password managers & 100+ services for universal protection.

The Yubico YubiKey 5 NFC is a compact, FIDO-certified two-factor authentication key that connects via USB-A or NFC. Compatible with major platforms and hundreds of services, it offers multi-protocol support including FIDO2 and OATH-TOTP. Engineered for durability with water and crush resistance, it requires no batteries or network, ensuring reliable, portable security for your online accounts.

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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TrustScore 4.5 | 7,300+ reviews

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Fantastic experience overall. Will recommend to friends and family.

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Model Name	YubiKey 5 NFC
Product Dimensions	3.94"D x 3.94"W x 3.94"H
Flash Memory Type	USB
Manufacturer	Yubico
Hardware Connectivity Technology	USB Type A
Global Trade Identification Number	05060408461426
Item model number	Y-237
Hardware Platform	Mac
Operating System	linux, mac_os
Item Weight	0.1 ounces
Item Dimensions LxWxH	0.71 x 1.77 x 0.13 inches
ASIN	B07HBD71HL
Is Discontinued By Manufacturer	No
Date First Available	September 17, 2018

Yubico - YubiKey 5 NFC - Two-Factor authentication (2FA) Security Key, Connect via USB-A or NFC, FIDO Certified - Protect Your Online Accounts

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