New Control Display module DIY kit for Arduino WB MAX7219 Dot matrix MCU 1PCS MAX7219 Dot matrix module MCU control Display module DIY kit for Arduino A single module can drive an 8 * 8 common cathode lattice Module size: 5 cm long X 3.2 cm wide X 1.5 cm high Module with input and output interfaces, supports multiple modules cascade The module left as an input port to the output port on the right.