Lenovo GemPC400 Compact SmartCard Reader Writer, PCMCIA, 20 g, Microsoft Windows XP / Windows 2000 / Windows NT 4.0, 54 x 5 x 85 mm Lenovo GemPC400 Compact SmartCard Reader Writer. Interface: PCMCIA. Weight: 20 g. Compatible operating systems: Microsoft Windows XP / Windows 2000 / Windows NT 4.0. Dimensions (WxDxH): 54 x 5 x 85 mm