Help massage the scalp, promote blood circulation, reduce stress and mental fatigue, improve sleep quality, and improve hair loss. Suitable for athletes, tired people, elderly people, office workers, drivers and other people with headaches or stress. Easy to massage anytime and anywhere at home, full of energy, lightweight, easy to carry and easy to use. 12pc ball, comfortable massage, suitable for scalp without pulling hair. Made of high-quality materials, soft and durable, not easy to break when used for a long time. Power supply mode: lithium battery Battery capacity: 500mAh (inclusive) Color: Red, Black(optional) Instructions: Aim the product at the head, press down firmly, and then press it to the proper position. Press the power button to start vibrating. If you dont want to vibrate, press the power button again to turn it off. During use, it can move up and down or rotate left and right, and the steel ball can roll 360 degrees. Packing list: 1 x Electric Head massager 1 x USB cable