This EOLE concept watch is pretty cool. That red ring that looks like something from an electric razor commercial is actually a generator that creates the power needed to run the watch face when the wearer blows on it. I would think it needs a battery too or the time would be reset each time you stop blowing on the face. link
This EOLE concept watch is pretty cool. That red ring that looks like something from an electric razor commercial is actually a generator that creates the power needed to run the watch face when the wearer blows on it. I would think it needs a battery too or the time would be reset each time you stop blowing on the face. link