The first mouse to work on nearly any surface, including glossy tables and shaggy carpets, does so by taking better pictures of what it’s on. The Explorer uses a blue LED, evened out with a diffuser, to create wider, more uniform illumination than either red LEDs or lasers. And whereas most mice snap the shadows of tiny bumps that appear only on mildly textured surfaces, the Explorer’s camera sits farther forward to capture the light that reflects off anything. $100; microsoft.com