LED Matrix 8 x 8 Red Common CathodeVersatile LED matrix. Easy to use with MAX7219CNG display driver and Arduino.Various libraries available. This is the one we use.Specifications8 x 8 matrixRed color3mm LEDsCommon cathode pins - easy to drive with MAX7219CNGFace color blackLens epoxy color white, diffusedViewed from top, pin 1 is bottom left , pin 16 is top left (see image)