Description: 1. A single module can drive a 8x8 dot matrix common cathode 2. Operating voltage: 5V 3. dimensions: length 12.8 cm X 12.8 cm wide and 1.3 cm high X 4. fixing screws with 64 holes with a diameter 3mm 5. module with input and output interfaces, support for cascading multiple modules Wiring instructions: 1. The left side of the module to the input port, the right to an output port. 2. When the control of a single module, simply input port connected to CPU 3. 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. ..