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That's a raspberry pi running Umbrel (probably). I have this. It's not very reliable and costs around $150. It's a toy really.

I assembled such a toy and can confirm, it isn't practical for the vast majority of self-sovereignty-concerned Bitcoin users.

Hah. I thought it was something worth considering especially because of its size. But if it's a toy then $150 is too much. xD Thanks a ton for the info. :)