32x32 RGB LED Matrix Panel has 1024 bright RGB LEDs arranged in a 32x32 grid on the front with 4mm grid spacing. On the back there is a PCB with two sets of dual IDC connectors (two input, two output: in theory you can chain these together) and 12 16-bit latches that allow you to drive the display with a 1:16 scan rate. On an Arduino, you'll need 13 digital pins, and about 1600 bytes of RAM to buffer the 12-bit color image.
These panels require 13 digital pins (6 bit data, 7 bit control) and a good 5V supply, up to 4A per panel. We suggest our 4A regulated 5V adapter and then connecting a 2.1mm jack.
Comes with: a single 32x32 RGB panel, two IDC cables, a power cable, 4 mounting screws and mini-magnets.
Adafruit Learn Link: https://learn.adafruit.com/32x16-32x32-rgb-led-matrix/
Arduino Library: https://github.com/adafruit/RGB-matrix-Panel
Adafruit Product Page: https://www.adafruit.com/products/607