Writing sign,LED ad Board,LED writing board,LED board,LED flash board,led message board,lighting writing board,writing sign,etc Acrylic LED Sign Writing LED Writing ... outdoor signs, lighted board, illuminated board, LED outdoor signs, acrylic sign, LED outdoor signs, LED marker boards, outdoor signage, you name it. Detail: ... certifiate or UL certificate.10.Gaurantee: 1year. Acrylic LED Sign Writing