Features: 1. Micro-current + high-frequency vibration massage: Deeply soothes the scalp, promotes blood circulation, allows the nutrient solution to reach the hair , and better promotes the absorption of nutrients by the scalp. 2. Red and blue light therapy: Red light strengthens hair , blue light repairs damaged hair follicles, helps to enhance metabolism, promote hair follicle regeneration, and protect scalp health. 3. Negative ion hair care: strengthen hair moisture, nourish hair, improve dry and frizzy hair, and prevent hair split ends. 4. Four levels of adjustable intensity can meet the actual needs of different groups of people, effectively massage and relax the scalp, maintain hair, and promote healthy hair growth. Elastic ball comb teeth, apply evenly without leakage of liquid medicine, more hygienic in medicine application; detachable liquid storage tank, more convenient for cleaning. HD digital display screen: Intelligently control the intensity level, turn on or switch between red and blue lights, and know the battery level at any time, making the operation easier. Specifications: Color: white Charging voltage: 5V Rated power: 3W Hair tank capacity: 10ml Battery capacity: 800mah Charging time: about 3 hours Use time: about 3 hours Display language: English Vibration gear: 4 gears Product size: 195 x 55 x 35mm Material:plastic Package Contents: 1 x Massage Comb 1 x dropper 1 x Type-C Charging Cable 1 x English User Manual 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.