This is Waveshare RGB Full-Color LED Matrix Panel, 4mm Pitch, 6432 Pixels, Adjustable Brightness.

An LED matrix or LED display isa large, low-resolution form of dot-matrix display, useful both for industrial and commercial information displays as well as for hobbyist humanmachine interfaces. It consists of a 2-D diode matrix with their cathodes joined in rows and their anodes joined in columns (or vice versa)

In a LED dot matrix display, the LEDs are located at the column and row intersections of the matrix.LEDs in the same row are connected together as are LEDs in the same column.

Interfacing tutorial of RGB-Matrix-P4-6432

Maybe be on the wall of tall buildings, maybe on corners of unknown streets, you can always see the dazzling neon light, everywhere in the noisy yet energetic city. Sometimes, looking at these shining screens, you may want to make a unique one, and give it to the beautiful night as a gift. Now, this6432 RGB LED matrix panelwill be the start to make your wish come true.

1. 2048 individual RGB LEDs, full-color display, adjustable brightness
2. 6432 pixels, 3mm pitch, allows displaying text, colorful image, or animation
3. 256128mm dimensions, moderate size, suitable for DIY desktop display or wall mount display
4. Onboard two HUB75 header, one for controller data input, one for output, chain support
5. Provides open source development resources and tutorials, for use with Raspberry Pi Pico, ESP32, Arduino, and so on

Packages Includes:

1 x RGB-Matrix-P4-6432 LED matrix and accessories

1 x Power supply terminal adapter

1 x 16P wire ~30cm