What is the effect of HairPro electric laser hair growth instrument?

HairPro electric laser hair growth instrument was planted by my girlfriend before, saying that it can not only prevent hair loss, promote hair growth, but also control oil. I have been using it since I bought it, and the frequency of use is not too high. I use it every other day for half an hour. The hat outside is like a fashionable baseball cap, which is very comfortable to wear. I usually wear it when I come home from work. It will be better to feel that the scalp is in a good relaxed state and the effect will be better.