OLED display, no need backlight, self-illumination, the display performance is better than the traditional LCD display, also lower consumption.Driver IC: SSD1306Size: 0.91 inch OLEDResolution: 128 x 32IIC interfacePin Description:GND: Power GroundVCC: Power + (DC 3.3 ~5v)SCL: Clock LineSDA: Data Lin..