Excerpt: For a no-thrills, ultrauseful mobile input device, put your hand on the Targus Ultra Mini Optical Mouse. At 3 inches in length, this little baby fits in any nook or cranny left in your briefcase. It's so small that you can mouse on a desktop, an airline tray table, or even your knee (we're not kidding!). The built-in 800-dpi optical sensor gives you accurate control on-screen. And the retractable cord makes wire tangles a problem of the past.