Medical Grade -  red light therapy cap for hair loss. Pictures show before and after results from just twice a week for 20 minutes, for 3 months! Two hertz settings: 10 or 40 hertz. Latest studies with 40hz has shown improved cognitive thinking, decrease in headaches, improved sleep, AND hair growth. Regular use shows hair growth between 4 and 6 weeks. Remarkable hair growth by the 4th month. Comes with a very nice case for storage.