Electric Scalp Head Massager: This smart scalp massager has four massage heads with 21 individual nodes each which rotates both in clockwise and anti-clockwise directions. 4 removable rollers with soft silicone to increase blood circulation to the scalp, promoting relaxation, releasing stress and relieving sore. Super waterproof IPX7: This scalp massager is made with IPX7 waterproof material, it can withstand water depths up to 1 m for 30 minutes