This is Dot Led Matrix Module incorporating MAX7219 Driver chip. The entire device contains a 150mA low-power shutdown mode, analog and digital brightness control, a scan-limit register allows the user to display the 1-8 bits of data. .By using the LED matrix, any symbol, character, a number of images can be displayed. Ā It is compatible with almost all controllers and processors like Arduino, AVR, PIC, ARM, etc.