500
Floating in the air mouse
This wireless mouse - essentially first mouse that works do not come into contact with the surface, while it simply "float" above it at a distance of one centimeter. This effect is achieved due to electromagnetic fields, so that it can operate only with a special, attached to it, the rug. It is believed that through this hand will not only be less tired and strained, but also this mouse is ideal for gamers as It offers maximum precision of movement. Surprisingly, its cost is quite acceptable - 75 USD