And the battery or power supply has what capacity??
According to the manufacturers 2 hours of active use, apparently this can correspond to a whole day of use (it draws no power when standing still or sitting).
Very promising! Early days, yet, but these things have a way of getting improved pretty rapidly once the prototypes are successful.
EDIT: The US has a lot of veterans with traumatic brain injuries and neurological deficits. I'll bet that we could help the inventors modestly, to speed up improvements and roll-out of more advanced models. Our VA is sadly underfunded, but these Scots probably don't need megabucks.