Features: 1. Streamline design with a handle, 2pcs AAA batteries operated, easy to hold and use. 2. This head massager is waterproof of IPX 7, for bathroom and daily use. 3. Vibration Frequency up to 7200 times/minute, massage your head, hair follicles and scalp effective. 4. Two different comb head of fin shape and cylindrical, promote your follicle metabolism and speed up blood circulation, take away the grease and other dirty. 5. Anti-static and anti-corrosion, high temperature resistance, no harm to your hair.