Give thinning hair a helping hand with this Rio HairGrow laser head band. It uses low-level laser therapy (LLLT) to energise hair follicles and boost circulation. The 60 red light laser diodes send energy right to the roots to encourage natural regrowth over time. And the soft, adjustable headband is comfortable to wear and fits all head sizes. That means you can use it while you relax, read or watch TV.Good to know- The USB rechargeable battery gives up to five uses per charge- It's safe and non-invasive so you can use it regularly- It's easy to use and suitable for both men and women