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The Rex Bionics Robotic Exoskeleton, called REX is the world's first hands-free, self-supporting, independently controlled robotic walking device that enables a person with a mobility impairment to stand up and walk. Worn on the lower limbs Rex enables the user to walk, move sideways, turn around and to go up and down steps. Rex is the only powered exoskeleton that is available for personal use. REX is designed and manufactured by Rex Bionics in Auckland, New Zealand.

User Controls
The user transfers into REX in a seated position and is supported within the device by a series of leg braces, straps and a harness. Once secure the user controls REX with a control pad and joystick. REX's power is provided by an onboard interchangeable battery pack. Rex weighs approximately 84 pounds (38kg) however the user carries none of this weight.

Technology
Each REX contains thousands of precision parts comprising REX's limbs which are controlled by a network of 29 micro controllers. The specialised array of micro controllers in REX allows it to move and respond within milliseconds ensuring REX movements feel smooth and instantaneous to the REX user. REX's power is provided by an onboard interchangeable battery pack. When fully charged REX can walk continuously for over two hours. Whether turned on or off REX is stable, meaning the user can stand fully upright for prolonged periods.

Brain-Machine Interface
In collaboration with the Cullen College of Engineering at The University of Houston, the Rex Bionics Robotic Exoskeleton is being used in the development of a brain–machine interface. Research is focused on the development of non-invasive methods of interfacing the human brain with robotic devices. REX users may be able to control the device by thinking of a movement, rather than using the REX joystick.

Innovation
In 2010 the Rex Bionics Robotic Exoskeleton was listed by The Huffington Post as being one of the best technical devices of the decade.