K40 USB Security Key - Two Factor Authenticator - USB-C with NFC, FIDO2 - Help Prevent Account Takeovers

Bought to replace yubikey(tm) that i lost. This looks better on my keychain. Works exactly as yubikey(tm) to secure my laptop and accounts. But much less expensive. I replaced the 5 NFC with this. The USB-C works with phone and laptop no need to use the NFC although It has it.

Lots easier and more secure than regular passwords. Most financial sites support the use of passkeys (come on Fidelity what’s taking so long?)

With not a whole lot of reviews I was skeptical of this product at first arguably but I gave it a try because I have been searching for a better hardware security key that actually works with modern devices that use USB C and NFC. I personally use a lot of Apple products so the utility of being able to plug this into my MacBook and tap it on the back of my iPhone and sign-in is clearly there. The only caveat is you can only set it up from a computer for example with Google but the NFC functionality is still there. I am not sure about the long-term reliability of this product and how effective it will be. But for now it is really the only durable and somewhat decent solution for people who use USB C devices like most modern laptops and have either an Android or iPhone. It works great with my google account and I look forward to testing more accounts soon.

This was one of least expensive USB C hardware keys on the market that I have found and yet it is easier to use and just as compatible as any one I have used. I am pretty sure by now I have tried almost every one on the market. My only complaint was the lack of security seal or anything to verify it wasn't opened since leaving the manufacturer. With ANY USB device this is important these days, but with anything like this it's an absolute must. If someone had previously opened it, they could've installed something on it or even added a tiny piece of hardware to make it install a Trojan on your system. So far every key besides Yubbi has this p roblem. I returned two keys due to it. This one was simple enough for me to test it on and unused system that was airgapped. It was clean and untouched so after testing it there a while I started using it regularly cause it's one of the ones that I use on my mobile device. I keep 5 key now because I had one stolen and two of a different brand fail that cost me 20k due to lost access to kmy accounts due to the way I intentionally set them up. So it was my own fault for not having enough backs ups. Lesson learned, you can't ever have too many of these incredible devices. I find it funny Amazon sells these but doesn't offer support for them on here. To me this is the best and only way I secure my accounts. Highly recommend getting at least one to go with 4 others or all 5 an be this one. Just make sure to keep one off site preferably in a fireproof safe or security vault of some kind. One of the best and most affordable yet.

When attempting to sync this key with my Coinbase account I am told time and again to enter the serial number to which I oblige and am told that number is incorrect. I have not had this issue with any other Fido/u2f/2fa keys in the past :/

Doesn't work at all with Android on Samsung Galaxy G20 phone- neither the NFC or USB, and I'm currently locked out of accounts. For NFC it says "couldn't read NFC device", and for USB it does nothing upon pressing the button. It does, however, work on my laptop. But if it doesn't work with new Android phones it's totally worthless. Will return.

Before I purchased this brand, I researched extensively. I've learned that this brand is on the compatibility list just as often as Yubikey. This key works just as well.

This thing cause my screen on my phone to turn off with some defect issue

The USB-C part of it works. But not the NFC - it did not work with my iPhone. Other NFC keys like Yubikey and Identiv uTrust worked with my iPhone. The iPhone did not detect the K40 over NFC.

, Three hours I tried to get it to integrate with Windows I just couldn't and it's pointless for Android almost all of our phones have fingerprint reader so, This does not do what it says. It's supposed to do

Suficiente para lo que necesito. Requería una llave para autentificación de doble factor sin la necesidad de tener mi celular conmigo, cumplió con lo que necesitaba. El manual funciona pero la página no es la mejor, desconozco si el soporte sea bueno o malo, no obstante no lo necesité, pude configurar la llave para google y microsoft sin problemas. OJO, no es una llave con detector de huellas, solo tiene un panel touch que funciona como botón. En cuanto al NFC no lo he utilizado ni requiero hacerlo, la construcción es buena y se siente durable, realmente por el precio creo que es la mejor opción ya que es USB-C y se ve y siente mejor que otras opciones del rango que son demasiado plásticas, delgadas y USB-A. Recomiendo

Thank you

Good product