A LED display panel includes a casing having a recess. The casing has a first side and an opposite second side, where the first side of the casing includes a first surface that is part of a first outer surface of the modular LED display panel, and the second side of the casing includes a second surface that is part of a second outer surface of the modular LED display panel. The casing has attachment points at the second outer surface. A printed circuit board is disposed in the recess. A plurality of LEDs is attached to a first side of the printed circuit board. A processor is coupled to the plurality of LEDs, where the processor is configured to process received media and control operation of the plurality of LEDs. The modular LED display panel is sealed to be waterproof and is configured to be cooled passively.