1.9 Segment E-Paper Module with I2C interface, for connecting with controller boards like Raspberry Pi/Arduino/STM32, etc.; No backlight, keeps displaying last content for a long time even when power down; Ultra low power consumption, basically power is only required for refreshing; Onboard MOS voltage translating circuit, compatible with 3.3V /5V MCUs; Provide online development resources and manual(driver board schematic, examples for Raspberry Pi/Arduino/STM32)