When the user is just walking along, the Cowarobot stays within arms reach and can travel up to 4.5 miles per hour. It's propelled by a pair of retractable wheels that are separate from the four non-automated wheels. When the user touches the handle, the autonomous motion shuts off and it becomes your average run-of-the-mill travel suitcase instantly.
Additionally, it automatically locks and can be unlocked by tapping the bracelet against the suitcase. Though it does have a combination on it as well to conform to TSA regulations and allow the owner to get inside when the suitcase is powered down.
And, good god, it does more. The power unit is removable, doubling as a portable charging station with USB ports for your phone. It also sets off an alarm on the bracelet once you move too far away from it, to remind you that you're leaving it behind. If it's, say, left in the taxi you took to the airport, Cowarobot has embedded GPS and its own app, so it can easily be tracked.