These are tiny, sharp, and most impressive OLED monochrome displays! Just about 1" diagonal, made of 128x32 individual white OLED pixels, each one is turned on or off by the controller chip.
This is similar to other 16x2 character LCDs that you've seen before but with one vibrant difference: The backlight is actually an RGB LED.
This is a colourful temperature gauge that reads out temperature in Celsius or Fahrenheit (user selectable). The temperature is displayed both in a digital readout and an analog bar graph.