Calculation-massager for those who lose vegetation on the head. I do not know if it will help, but I want to believe in a miracle. She arrived in a box, inside the detailed instruction. The comb works from two finger batteries, which were not in the set. Switch button one. When you turn on, the LED light bulbs light up and the calculation begins to vibrate. You can turn off the burning of the bulbs, leaving only a buzzing comb. The comb is made entirely of plastic and the teeth are harsh for the head. If you do not have to expect the effect from the bulbs, then the vibration will definitely benefit! This is a great massage for the head. Thus, the flow of blood will increase to the scalp and it will undoubtedly affect hair growth. Only you need to use daily!