RD2004A-8 is widely used among 20x4 character LCD displays.

The following color options are most widely ordered:

RD2004A-8-B White on Blue

RD2004A-8-Y Black on Yellow-Green

RD2004A-8-G Black on Gray

In addition, a wide range of options are available for this model, including:

Different Backlight & Color options (Including black color)

Different Voltage (3.3V, 5.0V and other customized voltage)

Different Interface (Including Serial SPI, I2C interface)

Different Temperature (Including Extended high temperature)