Features: 1. Roller medicine comb: essential oil storage box + smear dispenser two in one, let you say goodbye to the traditional way of applying medicine by hand, more clean and hygienic, without wasting medicine.Can be used with a of hair treatment liquids, such as hair restorer, conditioner and other products. 2. Massage the scalp while smearing the liquid evenly, so that the scalp can absorb the liquid better and more quickly, effectively soothing the scalp. 6 rolling ball teeth and 6 silicone teeth are combined to channel solution directly & uniformly into scalp and massage it. You'll enjoy both doubled nutrient absorption & better scalp status. 3. More Durable than Ever. Made of high polymer material & high hardness alloy, this comb boasts an excellent anti-corrosion capacity, and you can freely fill it with any solutions, like hair restorer, essential oil, nutrient solution, etc.Perspective window and volume scale design: The remaining amount of liquid medicine in the cavity can be observed in real time, and the amount used can be effectively controlled. 4. The 70ML -capacity liquid storage bottle can act as a handle, can fit your palm perfectly to much easier to control the applying force & angle, and effectively relieve your fatigue. making it more comfortable to hold and easier to operate. 5. 100% Detachable Liquid Bottle. Its tank can be easily unscrewed for cleaning, making its operation more hygienic. You can even connect the comb with a solution bottle, further simplifying the operating steps. Specifications: Liquid storage tank capacity: 70ML Cavity capacity: 4ml Operation: 1. Rotate the comb to remove it. 2. Fill the bottle with some solution (70ml). 3. Rotate the comb clockwise to tighten it. 4. Press down the pump to squeeze solution (4ml) into cavity. 5. Apply the comb on scalp and massage. Material: plastic colour: Black Package Contents: 1 x Scalp Applicator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.