1、Support Partial Refreshness: Electronic ink screen supports partial refreshness, low power consumption, wide viewing angle, and clear display even after power failure. 2、Working Principle: Electronic ink screen uses microcapsule electrophoresis display technology for image display, which works on the principle that charged nano particles suspended in liquid are subject to migration by the electric field and form a display effect close to that of traditional printed paper by reflection under ambient light. 3、180° Viewing Angle: Electronic ink display can clearly display the picture under the ambient light such as light, natural light, etc., without backlight, the viewing angle is almost 180°. 4、SPI Communication Interface: SPI communication interface, 3.3V working voltage, black and white display colors, light weight and easy to use. 5、Application Scenarios: Electronic ink display module is suitable for temperature and humidity meters, humidifiers, power meters, etc. Item Type: 1.9in Electronic Ink Display Material: Electronic ink Communication Interface: I2C Display Size: Approx. 41.35 x 28.11mm / 1.6 x 1.1in Segment Code: 91 Segments Display Color: Black, White Grayscale Level:2 Local Refreshness:0.3s Global Refreshness:2s Refreshness Power Consumption<5mW(typ.) Sleeping Current<001uA(Near 0) Viewable Angle>170° 1 x 1.9in Electronic Ink Display