https://shop.lnbits.com/product/nostr-signing-device

For example, the configuration link here does not work. I even found a link to the configuration, but there was no option to enter nsec...

And the previous device that was promoted (it has already been removed, probably due to the promotion of the new device). Device had virtually no updates for several months and remained in beta or alpha version... (I know because I have it) 😅

I hope that buying a new device will be a better purchase. 😉👍