Features: 1.Perfect for Medicine ApplyingEquipped with 6 elastic rolling ball teeth to introduce liquid medicine uniformly into the hair root, and a squeezable handle to control the volume. With it, you're free from hand stains and medicine waste. 2.Additional Massage Function7 auxiliary plastic teeth are used to massage the scalp, promote blood circulation underneath, and thus enhance the absorptivity of the medicine. 3.Multiples UsesApart from liquid medicines, the corrosion-resistant comb is compatible with many other liquids, like essential oil, hair-restorer, etc. Its enlarged inlet & graduated display significantly improve its using experience. 4.Humanized DesignAs a IPX7 waterproof comb, it can be conveniently rinsed in water after use; its silicone holder, dustproof plug, screwable tank and non-slip design put it ahead of all its competitors. Operation 1.Unscrew the tank anticlockwise. 2.Invert the tank and fill with liquid. 3.Load the comb and screw clockwise. 4.Apply on scalp and use. Caution 1.Please screw the tank in time after adding liquid, and put it on the silicone holder when placing it. 2.After use, please clean the liquid tank in time, as the dried-up residual liquid will block the comb teeth and affect their use. You can directly rinse the liquid tank with clean water and place the product in a cool place after drying. 3.Please store the product away from children. 4.This product is not a storage container, please do not store unused liquid in it. And do not add liquid to it when it is carried out for use. 5.Please do not break the comb teeth with sharp or hard objects, otherwise the teeth will be damaged and the sealing effect will be affected