The entire device contains a low-power 150µA shutdown mode, analogue and digital brightness controls, a scan-limit register that allows the user to display 1-8 bits of data, and a detection mode that allows all LEDs to glow.

Specification:
Module Operating voltage: 5V
Module dimensions: 3.2 x 3.2 x 1.3 cm / 1.26 x 1.26 x 0.5" (LxWxH)
Holes with four screws, diameter 3mm

Wiring instructions.
1. The left side of the module is the input port, the right side is the output port.
2. When controlling a single module, you only need to connect the input port to the CPU.
3. When multiple modules are cascaded, the input of the first module is connected to the CPU, the output is connected to the input of the second module, the output of the second module is connected to the input of the third module, and so on...

Taking 51 single chip microcomputer as an example:
VCC - 5V
GND - GND
DIN - P2.2
CS - P2.1
CLK - P2.0

Package Included:
2 x 8x8 Red Light LED Display Module
1 x 10 PIN Female-Male Dupont Cables