LED Dot Matrix Display are available  in various colors and brightness. Round pixel shape & square pixel shape for example.
Characteristics: Good Stability, low voltage,long life-span, engegy saving, even lunmance.. For ULM-12057AXBX, the emitting dot is 3.0mm diameter, 22.80*39.1*8.00mm, col & row of 5*7.

Application: outdoor & indoor using, used to represent characters, symbols and images.