... 3,full RGB color 4,CE,RoHS alibaba express led signs Where could alibaba express led signs be used ? 1.Indoor Advertising ... ,birthday party and other parties. How to use this alibaba express led signs?Write message with fluorescent marker pens,erase easily ... up and reflect many colors like neon. Specifications of alibaba express led signs:Frame Material : Aluminum alloyWriting area : High-hardness and ...