Scalp massager features and functions Rechargeable battery. Single button operation. Automatic turn off after 10 minutes. Blocking security protection. Two speeds - low speed and high speed. Two kinds of kneading - forward and reverse USB charging port. Charge management chip, use bw1000ma charger. Waterproof - level 7 3D head massage. Instructions please confirm that you are in a relaxed and comfortable posture before using, use massage hand on the head, it relaxes head nerves. (Please take care of your hair when you massage, the massager’s hand may swine your hair) press the switch, the massager starts to work. Press once to adjust speed and rotation. Low speed forward, high speed forward, low speed reverse, high speed reverse. Press and hold for three seconds to turn off the machine. Automatically, it will turn off, after working for 10 minutes. Charging indicator - low battery, it flashes green light. Full battery - green light is on. Adjust speed, it will turn red. If you switch speed, it will shine for short time. Rotation, it will turn blue. If you switch reverse, it will shine for short time.