This USB-powered trackball mouse, numeric keypad USB hub will suit the professional accountant or the part-time number-cruncher, no matter how many hours they sit at a laptop or netbook computer sweating over their spreadsheets. Combining a trackball mouse, numeric keypad and twin USB port hub, this accessory consolidates three peripherals into one convenient device, freeing up more space in your bag for accountancy books and other top reads.

Suitable for Windows 7 (32bit, 64bit)/Windows Vista (32bit, 64bit)/XP/2000/Me/Mac OS X 10.1~/Mac OS 9.0~9.2.2.

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Via TechFresh