Wacom CTL671 One Pen Tablet and Pen Bundle with Replacement Nibs (Black/Lime) Accuracy: +/- .02 in (+/- 0.5 mm) CTL471 Active Area: 5.8" x 3.6" /CTL671 Active Area: 8.53" x 5.3" Color: Black and Lime Compatibility: Windows 7, Vista SP2, XP SP3, Mac OS X.10.5 or higher, Intel Processor Connection: USB Type A (PC) , USB Micro (tablet)