1. Usb and PS2 port.
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2.1.With the digital mode ,analog mode and negcon mode
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3.Be able to alter height and gradient to suit the position you want
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4.Bigger cupule to stick to the desktop firmly
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5.180 circumgyration leading to more actual feeling and easier control
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6.With foot pedal and hand brake (optional)
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7.Available in different colors
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e-mail:deandeng#ty-tech.net