Raystar's REC002004BBPP5N00002 is an OLED alphanumeric display module. It has a 20x4 character display window and a window size of 77x25.2mm. This display is ideal for applications requiring a graphical user interface with a low power consumption, such as portable and embedded devices. It provides a bright display with vivid colors and a wide viewing angle, and can be used in a wide range of applications. Additionally, it supports a variety of interfaces, including serial, I2C, SPI, and other communication protocols.