Ploopy’s Nano 2 is a minimal trackball mouse with a single button Ploopy has been making trackball mice and other niche computer input devices for more than six years, including models with classic designs, one of the only decent USB touchpads available for Windows PCs, and some quirky devices like the Ploopy Nano Trackball, which is about as basic as an input device can get. Now the company has introduced the new 

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