Laser Therapy Hair Growth Comb is a hand-held comb-shaped low level laser therapy device,Reverse sparse hair promote hair growth, stimulate new hair growth, increase density & fullness. laser therapy brush utilize safe, low level lasers to stimulate, energize, and renew cells within the hair follicle for thicker, healthier hair. that emits laser light designed to promote hair growth in women and men. The device provides distributed laser light to the scalp while the comb teeth simultaneously part the user’s hair to ensure the laser light reaches the user’s scalp. Laser Therapy Hair Growth Comb is indicated to treat Androgenetic Alopecia, and promote hair growth in females who have Ludwig (Savin) I-4, II-1, II-2, or frontal patterns of hair loss and in males who have Norwood Hamilton Classifications of IIa to V and who both have Fitzpatrick Skin Types I to IV.users experience visible results in as little as 3 to 6 months (results vary) Low-level laser therapy (LLLT) Technology validated by 7 clinical studies, 14 international medical device licenses, and 6 published articles in medical journals.hair growth therapy comb has been proven in clinical trials to be six months, with at least 129 new hairs per square centimeter added after using a hair growth comb system. You will need to use the hair comb every other day for ten minutes to maintain results. The 48 laser lights of the hair combs lights, energy more evenly, Use 655nm laser light, safe and without side effects, increase density and fullness, rejuvenate damaged hair, restore hair growth cycle.clinically proven with 90% success rate, users experience visible results in as little as 3 to 6 months (results vary)