The LaserBand 41 is a home use medical device that delivers therapeutic light energy to your scalp through 41medical grade lasers. The total laser coverage is equal to 246 lasers with 1230mW of power output. This nourishing laser light stimulates hair follicles, reverses thinning, increases density & fullness, restores your hair's natural growth cycle and promotes hair growth. 246 Total laser coverage when moved over scalp (41 lasers x 6 areas) Fastest treatment time – as little as 3 minutes, 3 days a week