No backlight is required, and the last displayed content remains visible for a long time even after power is removed. It has very low power consumption, consuming power only during screen refresh. Designed based on the Raspberry Pi 40PIN GPIO interface, compatible with Raspberry Pi and Jetson Nano. Adopts the Raspberry Pi HAT+ standard, improving the interoperability of expansion boards and helping developers design and develop faster, making it easier to use various external devices and expand the functionality and performance of the Raspberry Pi. Reserved SPI communication interface for easy connection to main control boards such as Raspberry Pi / Arduino / STM32 / ESP32. Due to different batches, there may be differences in product appearance and printed text, which will not affect use. Color: As Shown Material: PCB Specification: Bare Screen Version Package Contents: 1*3.6 inch e-Paper Display Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.