The Waveshare 13186 e-paper display is a 4.2” screen with a resolution of 400 by 300 pixels and a window dimensions of 84.8x63.6mm. It utilizes e-paper technology to allow for an ultra-low power consumption system ideal for applications such as e-books, advertisement displays, medical instruments, and industrial controls. It has an ultra-wide viewing angle to provide a clear image from all viewing angles. The included technologies also provide a high contrast ratio, fast response, and a wide temperature operating range.