High Efficacy Advertising LED Light Box Model:MBP12228 Graphic Size:22.1” x 28.1”/(562 x 714mm) Visual Area:21.7” x 27.7”/(551 x 703mm) Frame Size:23.5” x 29.5” x 0.5”/(597 x 749 x 12mm) Power(Watt):21 Adaptor:12VDC/2A Problems Facing by Today's indoor Advertising Light Box: 1.High E
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