Looking like a large sweat band it detects the electrical activity from muscles as they contract and relax.
These signals are transmitted wirelessly to software which interprets these into control movements.
This type of control system is significant as wearable technology becomes more pervasive and shrinks in size and removes the need for the user to be in proximity of a ‘monitoring’ device, such as the Leap Motion (due for release May this year) or camera based technologies. It also has the advantage of being ‘discrete’ - especially when compared to voice based control systems.
Where this becomes really interesting is combining this tech with Google’s googles…..