This is the DefCom1 device from RedEdge
The device generates an intense beam of far red light which is then projected into each ear, one side at a time. The device uses only a p[art of the visual light spectrum, the so called “Far Red”. More and more studies are showing that light in this part of the visible spectrum can have a restorative effect on our tissues, like our eyes, our skin and in this case our hearing.
You can read a more detailed discussion and see some answered questions, here .