It's my favorite keyboard of all times (HHKB), Onion Omega2 and a powerbank. Together they combine into a dumb computer that can be used as a digital typewriter. Here's what I love about it:
- Instant feedback, the latency is around 32ms.
- No distractions, just typing away the text as in good old typewriter days.
- Cloud sync, when the devices goes online it uploads all the texts I've been working on.
More details in a blog post here.