Features:  LCD panel quantity: any row (m) X any column (n)  Edge distance between 2 panels: 18 mm(19〃, 20〃) to 20 mm (40〃)  None-key mounting installation  Cabinet thickness ?180 mm (19〃, 20〃) or 200 mm (40〃)  All steel cabinet, using wooden edge frame outside screen  Supports 1920 X 1200 or down compatibility