How do you recover your ability to log on if you lose the key?

Make sure you save the recovery codes when you set up 2FA / MFA.

Do the connectors retract? Looks as if they could be damaged carrying on a key ring in your pocket.

They do NOT retract, overall seems sturdy, I keep mine put up at home with a back up key in a safety deposit box at the bank. To make a copy after capturing the QR code with one key and saving the info, simply pull the key and stick the second one in and capture the same QR code, boom two copies, can do same with 2fa apps, the key is the same QR code, means same gateway sorta speak.

Does the yubi remained plugged into your device/pc the total length of time you are using device/pc, or do you unplug it once authenticated?

For OTP/U2F you only need it plugged in when you're prompted for the token (ie U2F on Github, Facebook, Google, etc.); It is a good security habit not to leave it plugged in. Yubikeys have many uses and while I don't know of any that require the Yubikey to be plugged in to maintain access you can use it as a "Smart Card" for logging into your computer (ie if the screen locks or you logout you will need it to log back in).

Does it work on 2020 ipad

Yes. The iPad Pro uses the USB-C connector. The regular iPad uses the lightning connector

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🔐 Elevate your digital fortress—because your accounts deserve elite protection.

PLUG PLAY CONVENIENCE - No batteries or software needed—just plug in and authenticate instantly.
NEXT LEVEL PASSWORD PROTECTION - FIDO certified to safeguard your online accounts beyond traditional passwords.
TRUSTED AMERICAN CRAFTSMANSHIP - Designed and manufactured in the USA for uncompromising quality and reliability.
FEATHERLIGHT SECURITY ON THE GO - At just 3 grams and 4 cm, carry robust protection without the bulk.
SEAMLESS DUAL DEVICE COMPATIBILITY - Effortlessly secure both your iPhone and PC with Lightning and USB-C connectors.

The Yubico YubiKey 5Ci is a compact, dual-connector security key designed for seamless two-factor authentication across iPhone and PC devices. Featuring Lightning and USB-C ports, it supports FIDO-certified passwordless login, delivering ultra-lightweight, plug-and-play protection without batteries or software. Engineered in the USA, it’s the essential tool for professionals demanding next-level online security.

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Manufacturer	Yubico : Patelcraft Solutions Private Ltd : Email Id : [email protected], Yubico : Patelcraft Solutions Private Ltd : Email Id : [email protected]
Global Trade Identification Number	05060408461969
Item Height	5 Millimeters
Item Width	12 Millimeters
Product Dimensions	4.03 x 1.2 x 0.5 cm; 3 g
Item model number	Y-291
Hard Disk Description	Solid State Drive
Power Source	Electrical Cable
Operating System	Windows 10
Are Batteries Included	No
Included Components	USB Cable
Manufacturer	Yubico : Patelcraft Solutions Private Ltd : Email Id : [email protected]
Imported By	Patelcraft Solutions Private Limited
Item Weight	3 g

Yubico YubiKey 5Ci - Two Factor Authentication Android/PC/iPhone Security Key, Dual Connectors for Lighting/USB-C - FIDO Certified USB Password Key, Protect Online Accounts with More Than a Password

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