tech, tiny computer
For those interested in building their own, this is:
* One Raspberry Pi Zero W. I used the Vilros starter kit (~$35)
* One Waveshare 4.2 inch e-ink display ($10-40 depending on wholesale rates)
* One HI-S025 solar charger (~$40)
The thing is wireless and can do USB and HDMI too, which is just crazy.