Our cutting edge technology utilizes Red Light & EMS Therapy to help regrow and strengthen the hair. This is perfectly safe and enhances blood circulation & nutrient absorption for superior results. Make sure the Scalp Massager is charged and that the reservoir is loaded with your preferred hair serum. Opt for one of three modes - Vibration + Red Light, Red Light Only, or Vibration Only. Dispense the serum by pressing the tank cap, and then move the device in circular motions across the scalp.