4 In 1 Max7219 Rgb Dot Led Matrix Common Anode Mcu 8x32 Control Led Display. Specification: LED Color: Red, Green, Blue (Option) Operating Voltage: 5V Dimensions: 12.8X12.8X1.3cm Fixing Screws with 64 Holes with a Diameter 3mm Module with Input and Output Interfaces, Support for Cascading Multiple Modules  Wiring Instruction: 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, T He First Two Modules of the Input Terminal of the Three Termination Modules, and So On...  51 Microcontrollers  For Example: VCC -- 5V GND -- GND DIN -- P2.2 CS -- P2.1 CLK -- P2.0  Package Included:1 * 4 In 1 MAX7219 LED Dot Matrix Module with 5P Jumper Line for Arduino. We are an international seller, your order will be shipped from abroad so please allow the necessary time of minimum 14 working days for delivery right now depending on where you ship to, due to ongoing delays in postal deliveries globally.