... -proof, dust-proof, fog-proof) Specifications1)Smart modular LED displays. 2)Smart all-weather protection (Water-proof, dust-proof ... , fog-proof) 3)Five-year limited factoryFeaturesSmart modular LED displays. Smart all-weather protection (Water-proof, dust-proof, ... fog-proof) Smart front-serviceable design Smart matrix ventilation Smart case design(rust-proof, ventless, lightweight ...