Massage comb for long hairSuitable for seborrheic alopecia, alopecia areata, physical alopecia, chemical alopecia, female postpartum alopecia, female menopausal alopecia, sub healthy alopecia, head mites and poor blood circulation on the head, blocked hair follicles, root malnutrition, brain use All kinds of hair loss caused by excessive How to use electronic comb: 1. Press the on key to turn on the device. At this time, there are acupuncture, laser, and infrared output. Use