Genius G-Pen 4500. Connectivity technology: Wired, Device interface: USB, Working area: 10.16 x 13.97 mm. Minimum RAM: 64 MB, Minimum hard disk space: 4 MB. Tablet weight: 0.355 kg. Compatible operating systems: Windows 2003, XP, Me, 2000, 98SE Mac OS 9.X, 10.2.6