 The basic mechanic of how e-ink displays work is interesting by itself, but flexible e-ink displays take things to another level by making the otherwise rigid layer technology pliable enough for mounting on a curved surface. Just like a classic e-ink panel, this 2.1 inch flexible display can be programmed via the e-ink friend featherwing, either connected directly to the board's 24-pin port or from a distance using an FPC cable and extender, therefore allowing us to mount the flexible display on the side of a container, or a lamp post on the street, or maybe the human forehead, you never know.