Imagine a Keyboard without Keys, you don't have to press anything, when you got 2 mouse in both hands.
Presenting the OrbiTouch.
If you have any kind of physical limitation with your hands, wrists, or fingers – you know how difficult it can be to use a traditional computer keyboard. The orbiTouch is used by people who have arm or hand prostheses, limited hand and finger use due to injury, arthritis, carpal tunnel syndrome, spinal injury, burn, stroke, cerebral palsy and many other physical conditions. It is also being used by people who are visually impaired, blind, have autism, or have traumatic brain injury.
It’s really not a keyboard at all. Yet it lets you communicate just as if you had no limitations at all…!
SOURCE: Linus Tech Tips