OLED (Organic Light-Emitting Diode) means that the screen consists of all small LEDs (each pixel equals 1 LED). As a result, the display does not require a backlight and is much more economical to use. In addition, this gives a much higher contrast, making this display very clear and legible despite its size. This display can be addressed via the I2C protocol, so that only 2 wires can be used to call 128x32 = 4096 pixels.
Dimensions: 38 x 12 x 2.4 mm (HxWxD).