Kiierr International LLLT laser caps are clinically proven to promote thicker, fuller hair in both men and women. In just 30 minutes every other day you’ll see those frail follicles transform into thick & healthy hair once again!The Kiierr International laser hair growth cap is a powerful, cutting-edge low-level laser device for the treatment of androgenetic alopecia (pattern baldness). The 272 independent laser diodes are contained in a sealed unit that is powered by a lithium battery.