1) Scalp Massager-With 28 individual nodes and 3D Deep-Kneading, perfectly fit the scalp,hand-simulation and fully massage head. 2) Waterproof & 4 Modes-Dry and wet dual purpose,IPX7 grade of waterproof. 3) Cordless and Rechargeable-One button operation,easy to use. 4) Patented Hand-Simulation & Safety Protection:This Head Massager is custom-designed,total 28 contactors are perfectly fit the scalp,deep and fully massage head and body.