How to use: The machine is easy to use with one button, can be used for 20 minutes each time, and automatically turns off after 20 minutes. It is recommended to use indoors at 25 ° C for good effect. It is used an average of 3-4 times a week and can be used once a day in severe cases. Use time and effect: Use 4 to 18 weeks to improve scalp oil secretion, hair loss will return to normal levels. Use it for 18-26 weeks to improve the hair growth environment, resulting in thicker, fuller, and healthier hair. After 26-52 weeks of use, hair growth enters a full growth cycle, the number of hairs increases significantly and the germinal system of the hair follicles returns to its original normal function. Specification: Item Type: Hair Regrowth Helmet Material: ABS Laser chips: 160 pieces Single light chip diameter: