... to install 3,best choice for business super thin A4 el backlight sheetit is the best choice for business ... business advertising ,sales promotiion,shopwindow,on street ,at bar wall ,at home when festival come,tax,bus,on high building ... mm A2=594*420 mm A3=420*297 mm A4=210*297mmOut door large-scale super thin el panel ... + 65 ° c storage temperature - 65 °c ~ + 85 ° c super thin A4 el backlight sheet