So I picked one of
these up on a whim off taobao just becuse they're dirt cheap. Typing on it now.
First thing I noticed that one row of LEDs was not working. One of the component fell off during shipping. I think LED lighting on keyboards is kinda dumb to be honest, but if the board has 'em, I want them working, so I found the component, whipped out the soldering iron and fixed it up. Deconstructing requires peeling off part of the label on the bottom as there's a hidden screw under there.
So how do the keys feel? Alright, I guess. Nothing revolutionary. Feels like a cherry black switch, which makes sense as they sold it with their 'black' switches to me. There was a blue version too but I didn't bother with that. Keys are very bouncy (spring bounce, not electronic bounce) and take a fair amount of force to bottom out. I find I don't bottom out on these, as actuation is very predictable.
Construction is OK, but nothing to write home about. Whole thing appears to be made of ABS plastic (case, plate, keys).
No programmability it seems, other than the ability to define a set of LED keys for, say, a game. There are already presets for CS, LoL and other games.
I took a look at the PCB but can't quite figure out how the Hall Effect works. There are two rings for the two springs (the large diameter outer one, and the small diameter inner one that tapers to a blunt point). Both seem to contact the PCB (the outer is always in contact, the inner may touch when key is depressed. Not entirely sure how it's meant to last billions of keypresses if the spring is hitting the PCB every time. And not sure what the components are either - does anyone have a clue? Or even better, a shematic?
I have not tried typing underwater with it...