... size:A1,A2,A3,A4,A5 3.light panel 4.poster can be changed 5.OEM service 1.LED crystal ... light box with poster changing2.Size:A1,A2,A3,A4,A53.transparent front- ... , "U" shape holder, Light panel, black back panel4.insert poster, easier change5.Led lifespan 80,000 hours6.Low power consumption ... \ idea or OEM are welcomed LED acrylic crystal window wall mounted light box