No backlight, retains displayed content for an extended period even when powered off. Ultra-low power consumption, energy is primarily used during screen refresh. SPI interface for connecting to controller boards such as Nucleo, etc. Onboard voltage translator supports 3.3V/5V MCUs. Specifications: Operating voltage: 3.3V~5V Interface: 3-wire SPI, 4-wire SPI Dot pitch: 0.212 x 0.212 Resolution: 400 x 300 Contrast ratio: 2 Full refresh time: 4s Refresh power: 26.4mW (typical) Standby power: less than 0.017mW Viewing angle: greater than 170 degrees Color: Blue white Material: PCB Size: 103 x 78mm Package Contents: 1 x 14.2 Inch E-Ink Display Module 1 x Wire Note: Light and display settings may cause slight variations in color compared to the actual product. Measurement error allowed is +/- 1-3cm.