According to Berkley Bionics, the creator of the exoskeleton,
The device is battery-powered and employs a gesture-based human-machine interface which — utilizing sensors — observes the gestures the user makes to determine their intentions and then acts accordingly. A real-time computer draws on sensors and input devices to orchestrate every aspect of a single stride.
From science fiction to science fact, how cool! Science and progress - two reasons to look forward to the future.