Contour Design’s RollerMouse works in conjunction with a keyboard and comes with a ‘roller bar’ that lets you to move the cursor around and click on icons. It acts as a base for your keyboard, and the roller bar and buttons fall within easy reach of your thumbs. It has three buttons and one scroll wheel; the roller bar doubles up as a left click. You can set the sensitivity of the click by increasing the tension via a knob at the base. To attach the RollerMouse, you need one USB port. Drivers are not needed for PCs with Windows ME and later versions. It costs $189 (approx Rs 8,127) and can be bought online.
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