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1.9″ Segment e-Paper module, support partial refresh, low power, wide viewing angle, paper-Like displaying without electricity, ideal for temperature and humidity meter, humidifier, digital meter etc. Onboard I2C control interface, for connecting with controller boards like Raspberry Pi/Arduino/STM32, etc. Onboard MOS voltage translating circuit, compatible with 3.3V/5V MCUs 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