It's a small, elegant item which does something quickly and easily that no-one thought could be done at all. Needs no batteries.Our amazing, award-winning Nitty Gritty NitFree Comb quickly and easily removes not only head lice and unsightly nits (empty egg cases) but also extracts 'live' head louse eggs before they hatch. Instead of nasty chemicals, it gets the job done using advanced design and old-fashioned common sense.