HairMax is the only at-home FDA Cleared (Class II) medical device to treat hair loss and promote hair growth in men and women. It is a breakthrough hair growth laser light device that is lightweight and even includes 4 AA Batteries for your convenience! The LaserComb provides low-level laser light energy that stimulates hair follicles promoting new hair growth. With consistent use, most users start seeing benefits in 16 weeks (confirmed in clinical studies). Patented teeth technology separates hair for maximum treatment results.