The display consists of 8 x 8 LEDs of 3 mm. The module is controlled by the MAX7219 chip, making this module easy to control by means of a microcontroller such as the Arduino. It is also possible to connect these modules to each other up to a maximum of 51 modules.Content:1x PCB board2x 5P row headers1x 24P IC socket1x MAX7219 chip1x 10uF electrolytic capacitor1x 0.1uF ceramic capacitor1x 10K resistor2x 8P row header1x 3 mm 8 * 8 common cathode red dot