'Couch Mouse'

Find yourself doing a lot of work on your laptop on your bed or couch? You now have a mouse specially designed and optimized to work on that type of surface.

http://mashable.com/2011/01/30/logitech-couch-mouse

"Logitech claims its Couch Mouse M515 is optimized for soft surfaces such as sofas, beds or carpets. No stranger to the wonders and allure of a comfy couch, I was eager to see if it could do better than other pointing devices at navigating a PC from, shall we say, more relaxing surroundings.

I got the Couch Mouse working just a few seconds after plugging in Logitech’s signature “unifying receiver,” a USB dongle scarcely the size of a thumbnail that communicates flawlessly with most of its new pointing devices. Flipping on its switch underneath, the Couch Mouse was ready for action.

Next it was time to try the mouse on a variety of surfaces, and it was able to navigate them all as if it were sliding around on a mousepad. Logitech calls the mouse “easy gliding,” and that’s a true statement. Not only is its sealed bottom resistant to dust bunnies and various fibers, it’s sensitive enough to use almost anywhere. In addition to a leather couch, a cloth couch, various blankets and sheets and a variety of carpets, the mouse was able to track perfectly on granite, slate, all types of wood, and even though Logitech doesn’t recommend it, it did a respectable job of working on a overturned glass bowl I had on the coffee table."