The iRestore is protected by a 1-year manufacturer's warranty against defects. FDA 510(k) cleared medical device. Must be at least 18 years of age to purchase this FDA-cleared laser hair growth system. Please refer to the Norwood-Hamilton Scale (approved: Class Ila to V) / Ludwig-Savin Scale (approved: Class I to II) and Fitzpatrick Skin Type Scale (approved: Type I to IV) for compatibility. Not indicated for users with severe hair loss. iRestore has been clinically tested for males between the ages of 18 and 48 and females between the ages of 18 and 60. While it has not been clinically tested for anyone outside the range, it does not indicate it will not be effective for anyone outside the range. If you are taking medications that affect skin sensitivity to light or have a medical condition that makes you extremely sensitive to light, please consult your doctor before use. This device is FDA-cleared and indicated to treat androgenic alopecia.