Lexmark 2591. Character pitch: 12 cpi, Maximum resolution: 360 x 360 DPI. Paper dimensions: 559 x 139 mm, Supported media weight(s): 60/90 g/m². Weight: 9.8 kg, Dimensions (WxDxH): 634 x 290 x 195 mm. Compatible operating systems: Windows 2000/NT/Me/XP/2003/98/Vista/7 Linux. Certification: UL 60950-1, CSA, FCC B, CB IEC 60950-1, SEMKO, GS (TÜV), CE B, SMA C-TicK