... nights and days, especially Dazzling in dark environment. Product DescriptionLED writing board/LED writing signs: * Black background with black / silver/ Golden aluminium ... Output: DC12V/2A * 7 color LED ligths. 12 Twinkle type Product features:- LED Fluorescent writing Board can work in nights and days, ... , companies, schools, churches, etc.aa Sparkle High brightness RGB sparkle LED Writing Board