... stores, etc BBK Advertising LED Light Box♥ Product name: led light sign, light box, slim light box ♥ Structure of single side ... need to open the advertising screws;♥ Light source: LED lights (light on 2/4sides);♥ Color of light: red, green yellow, blue, ... ;♥ Certificate: CE, CCC, etc;♥ Application: widely used in business center, indoor decoration, chain stores, corperate signs, supermarket, airport ...