I&#x27;ve done laser hair removal, and while it does hurt like a bitch, and does only work on dark hairs, the claims were that the razor would use a wavelength that targeted all hair (I don&#x27;t know enough to say that&#x27;s not plausible), and  presumably they&#x27;d use a short enough focal length to only hit exposed hair, rather than the normal method of focusing on the hair below the surface.<p>Doesn&#x27;t get around the smell, power requirement, or heat output though.