1.External Frame Material:Aluminum alloy 2.Product Thickness: 18mm 3.Overall Size: 500*700mm 4.Image Size: 450*650mm 5.Viewing Size: 440*640mm 6.Waterproof, particular structure design makes it anti-rain, single side. 7.Key lock, it\\'s safe and easy to change the graphics. 8.Energy saving, adopting LED light is more than 75% power saving compared with traditonal light box. 9.Long life-span, can reach 30,000hrs, and make sure the light attenuation would be less than 10% in the first 8,000hrs. 10.Environmental protecting, all material are degradable. 11.CE & UL certificate. 12.Applications: It is widely used in streets, hotels, office buildings, airports, transportation stations,etc.