This video claims this is smallest and lightest ereader:
https://www.youtube.com/watch?app=desktop&v=oqFmITJ_PW0
Sounds like it's lighter than an InkPalm, and the screen is smaller. The case seems bigger though.
The main thing I like about it is it seems to have no additional layers above the e-ink. So should be matte and relatively clear.
The case design seems a bit clunky, and I'm guessing it doesn't have a touchscreen or Android. But might be an interesting alternative to an InkPalm or Hisense Touch.