Waveshare 1.9 Inch Segment E-Paper Module for Temperature/Humidity Meters, Humidifiers, Digital Meters

Not every instrument readout needs full pixel-graphics capability - a temperature display, a humidity meter, a simple digital gauge usually just needs large, clearly legible numerals, which is exactly what a segment-style display provides without the complexity (or cost) of a full graphics panel. Built on e-paper technology, it holds its displayed value with zero power draw once written, which matters for a battery-powered instrument that updates its reading periodically rather than continuously. Purpose-built for exactly the instrument-readout role its name describes, rather than being a general-purpose display pressed into that role.