Kiierr laser caps, powered by our exclusive PureLaser™ technology, utilize only high quality medical grade laser diodes (no LEDs) to deliver precise, effective LLLT at 650 nm for optimal hair regrowth. Simply use for 30 minutes every other day, and start seeing results in as little as 6–8 weeks, with significant improvements typically visible within 4 to 7 months. New In Box Smoke Free- Clean Home