It’s using a reflective LCD panel. I’m curious if that panel is limited to b&w or if it’s a typical color LCD limited to b&w in software. Color reflective LCDs exist (I saw a LTT video where they reviewed a desktop monitor using one[0]), they are used in digital signage and less on the consumer side.

Daylight does say they made modifications, but haven’t gone into a ton of detail around what those are (at least not that I’ve seen).

[0] https://m.youtube.com/watch?v=c0TcGjzKbag