... 2.size:A1,A2,A3,A4,A5 3.light panel 4.poster can be changed 5.OEM service 1. ... LED magnetic light box 2.poster can be changed easily.3.transparent front ... -panel, "U" shape holder, Light panel, black back panel4.insert poster, easier change5.Led lifespan ... OEM are welcomed A1 A2 A3 A4 A5 LED magnetic crystal window light box