Building a panel out of e-ink electronic shelf labels
I never quite understood why shops use those electronic shelf labels.<p>Most of them <i>can't</i> be updated by someone in the store headquarters remotely.  Someone has to take a bluetooth programmer device around and program each one by hand.    And if they're doing that, they might as well just take a handheld label printer or sheet of labels.<p>Benefit of the labels is they're clearer than e-ink, brighter, and more colorful (more sales)