This is a 32x16 RGB LED Matrix Panel, it has 512 full-color RGB LEDs in all. Each LED can be independently addressed and controlled. It requires at least 13 digital GPIOs to control the LED matrix. The led matrix has 2 IDC connectors (DATA_IN, DATA_OUT) on the back, you can cascade multiple panels and make a huge screen together. BUT Arduino doesn’t support this function, its speed is not enough to multiple panel.
Note: This panel needs a 5V/2A power supply. And if you connect 4 or more panels, it needs a high performance controller, such as Mega 2560, Raspberry Pi, etc.