The picture shows the board (red) fitted to a standard 16 character by 2 lines LCD display. Such displays operate using the standard Hitachi-Densitron interface method. We offer an Arduino-compatible software driver in our downloads section. The driver allows control of the LCD backlight….so you can turn it on/off and flash it at will. It has a preset control to set contrast, and can run at a much faster IIC rate than other such products (1.7MHz max) It has jumpers to set the IIC address, allowing a maximum of 8 displays to be run from the IIC bus (though we have no idea why you would want to do that). It has a small power-on LED.
To download the Arduino software driver, click here and add to your basket. A download link will be available in your account on completion of your order.