... easy to change picture 3 LED illuminate 4 Advertising 5 2 year warranty 1. Description of light box drawing 1) Adopt ... , station, subway, bank, bus station, large exhibition project etc.2. Techniquie Parameter Light sourceSizeFrame size (mm)Viewing size (mm)Thickness ... )-ISO 9001:2008, SGS, 7 years Gold Supplier certificated 2)-Monthly Production Capacity -- 50,000pcs lightboxes3)-All goods examined ...