Electric Scalp Massager is good elasticity and high flexibility, which has 12 TPE 3D massage arm. It is convenient to massage your head and remove stress. Electric Scalp Massager has a USB charging port and four red led lights. No need to use any batteries. When you press the on-off keying, and start the product, the four red led lights will be on. Electric Scalp Massager is very easy to use this product. It has only one key. The key is for on-off and three gears. The first time you press the key, you will start the product. The second time you press the key, you can choose different gears. There are three gears in total. Electric Scalp Massager can be used in many ways, and it fit the curve of your head very well. When you feel tired, you can use it to relax.