MAX7219 LED Dot Matrix 4 In 1 Display with 5P Line Module
The MAX7219 4-in-1 Dot Matrix Display Module is an integrated serial input/output common-cathode display driver that connects a microprocessor to an 8-digit 7-segment digital LED display. It can also interface with a bar graph display or 64 individual LEDs. The module includes a BCD encoder chip, a multi-channel scanning loop for segment drivers, and static RAM (8×8) for data storage, requiring only one external register to set the segment current for each LED.
Each module features an 8×8 LED matrix, with precise control provided by the MAX7219 driver, allowing you to create desired color patterns. The major advantage is that you can control all 64 LEDs using just three output wires connected to microcontrollers like Arduino.
It utilizes a convenient four-wire serial interface compatible with common microprocessors, allowing data to be addressed individually without needing to refresh all displays during updates. The MAX7219 also provides the option to encode or not encode each piece of data.
The entire device features a low-power shutdown mode (150μA), analog and digital brightness control, a scan limit register for displaying 1-8 bits of data, and a test mode that illuminates all LEDs.
Features 
Requires only 3 communication wires of MCU
Pre-cascaded MAX7219 Dot Matrix LED Module.
The overall size of the display is very compact.
The PCB features M3 holes for mounting.
Module with input and output interfaces
Support for cascading multiple modules.
Quite large display
Wiring Instructions:-
The left side of the module to the input port, the right to an output port.
When the control of a single module, simply input port connected to CPU
When a plurality of cascaded modules, input and output termination CPU, an input terminal of the second output end of the first module a module, the first two modules of the input terminal of the three termination modules, and so on..