This RollerMouse Red is by Contour Design, a manufacturer of ergonomic computer hardware. It's presented as an alternative to the computer mouse: Rather than being off to one side, it's placed in the center, between you and your keyboard. The idea is that you use it with both left and right hands, with your wrists supported on a pad, and that this arrangement reduces strain.

To move the cursor up and down, you roll the studded bar. To achieve left and right motion, the bar slides from side to side.

Furthermore there are gigantic clickable buttons beneath the rollerbar, as well as a scroll wheel.

"Its centered design and smooth rollerbar keep your hands in a natural position," the company says, "cutting strain and boosting comfort."

Here's what it looks like in action:

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The RollerMouse Red runs $374.