HP Engage One W Serial + Power Adapter, POS printer, 8.25" (209.5 mm), 10.2" (259.5 mm), 2.56" (65 mm), 29.3 oz (830 g) HP Engage One W Serial + Power Adapter. Type: POS printer. Width: 8.25" (209.5 mm), Depth: 10.2" (259.5 mm), Height: 2.56" (65 mm)