High quality menu board high brightness 5050 RGB SMD LED Abrasion resistant PMMA board PATENT,CE,ROHS,FCC,UL,CB,GS,PSE Huaqi Technology ... design, patent number ZL200920133615.6We manufacture 5 series LED writing board as bellow:A series: This is our best selling type ... HQ338.HQ438. HQ584. HQ638. HQ855. HQ790M series: This is Multifunctional Board, with removable background, you can use as see through T ...