Yeah you connect it with a USB. The software you install to the device is this one: https://github.com/lnbits/nostr-signing-device
Discussion
thx. but how i use it if i installed the software. i cant find information for that only that i need nos2x, but it didnt work. the device shows in green letters NSD and under that nostr signing device. so the flash worked.
I believe you need a browser plugin like nostr:npub180cvv07tjdrrgpa0j7j7tmnyl2yr6yr7l8j4s3evf6u64th6gkwsyjh6w6's Horse plugin: https://github.com/fiatjaf/horse
That said, I haven’t set it up myself yet