Module Parameters:
1 single module can drive a common cathode 8 * 8 dot matrix red
2 module Operating voltage : 5V
3 Module size : 5 cm X 3.2 cm wide X 1.5 cm high
4 holes with four screws , diameter 3mm, can be fixed by using
our M3 studs
5 modules with input and output interfaces , support for cascading multiple modules