Electric Head Massager with 4 silicone massage heads, soft 96 rotating kneading nodes can scratch, pinch, knead and knock the scalp by imitating the technique of a massagist, which is helpful to relieve body and mind, promote hair growth and improve sleep quality. Head Scalp Massager is made of IPX7 waterproof material and anti-skid thread design help you hold it better in shower