I have one but I haven't used it in a long time. When you plug it into the USB port, it generates an image file of a paper wallet. You just print that. You might have to tell the computer that it is a storage device.

BTW, plugging that device into a printer is absolutely the safest and most convenient way to make a paper wallet.

Sorry, I don't know what might be wrong. Here is a copy of the user manual: https://www.mycelium.com/assets/entropy/me.html

I have one but I haven't used it in a long time. When you plug it into the USB port, it generates an image file of a paper wallet. You just print that. You might have to tell the computer that it is a storage device.

BTW, plugging that device into a printer is absolutely the safest and most convenient way to make a paper wallet.

I did not use Mycelium entropy before but as I see it, using Mycelium Entropy without being connected directly to the printer will defeat the purpose of this USB. Mycelium entropy was designed to produce a randomly generated keypair when it is connected directly to the USB port of the printer. Also, the generated key pair is not stored in the USB, so when device has been ejected the key pair is automatically lost, which makes it ideal to produce your private and public to ensure that the keys are not compromised.

So far this is the most accurate guide I have seen on the internet.
[1] https://coinsutra.com/make-bitcoin-paper-wallet-spend-bitcoins/
[2] https://github.com/bitcoinbook/bitcoinbook/blob/develop/ch04.asciidoc - paper wallet generation is found on the last page.

Saving a page and running it later offline is equal to running a software with unverified source code. You could try to verify it yourself of course, but you need to be a Javascript expert and still there's a chance to miss the backdoor code.

The correct way is to launch a live OS, create some private key - address pairs with a wallet like Core or Electrum, and print them out as QR codes. You won't have those fancy designs, but it's much more secure. You can also create an Electrum wallet, write down the seed with pen and paper and print out as many addresses as you need - this will avoid the risk of exposing your private keys to an untrusted printer.

If you just want to generate and print paper wallet, there are many options available.

https://segwitaddress.org/

https://segwitaddress.org/

https://walletgenerator.net/

For safety, it's recommended to save the whole page and disconnect from internet to generate a new wallet. Or for the peace of your mind you can even copy them to a non connected device to generate a wallet and print them.
If you want to generate wallet with some prefix, you can use vanitygen offline.
https://bitcointalk.org/index.php?topic=25804.0

$6k (~1btc at the time)

Are any of these cards available for purchase

ok great! thanks! now to dig thru and double check mine lol

and a red one? did you open it?

ahh crap then - I dont want to open them to verify - wonder if there is another way to tell?