Genius Ring Mouse 2
It's hardly a diamond ring, but this little computer mouse that doubles as jewelry could come in handy during a presentation -- or if you just like the option of using an air mouse.
The mouse, which measures 1.3 x 1.5 x 1.0 in. and weighs 0.38 oz., has a touch panel and five buttons to help you navigate and execute commands. Using a USB receiver and 2.4GHz wireless technology, it works up to 10 meters away from your Mac or Windows computer. The ring is made of rubber (for comfort) while the mouse comes in silver or titanium colors.