A solar cell a few inches in size that’s only exposed to indoor lighting doesn’t generate a lot of electricity, so these electronic sticky notes utilize low-res e-Ink displays that can only be updated and refreshed about once every minute in ideal conditions. You won’t be using them to watch videos, and they can only display a couple of blocky characters at most. But they can still be a useful way to get a quick idea of how many unread emails are sitting in your inbox.


The wireless design of these tiny screens also means they can be easily shared just like you would pass a sticky note onto a co-worker. The only drawback would be the price, but as long as the overnight cleaning crew doesn’t throw them out, you can keep using these sticky notes as long as there’s at least a little bit of light in your office.