... raw materials signboard design 2.Elegant appearance 3.Waterproof and anti-rust 4.Inner LED modules signboard ... RGB color LED letters with programmable controller for option)4. Inner high quality waterproof led strip( with CE & ROHS certificate); ... .25w6. High transmission of light with unique light absorption layer 7. Feature: ametabolic,waterproof ,fireproof ,corrosion resistance,fastness8. Intensity ...