I must tell you my true experience. I haven't had much hope for these physiotherapy products. One day, a colleague in my office told me that the effect was good, so I wanted to try it. My main reason is that my sleep quality is poor. For many years, I was miserable and dreamy. I did it for four months, and the effect was really good. I'm still dreaming, but my dreams are very shallow and few, and then there is the dream content department. But until now, I still want to buy this instrument. I want to go through another stage before making a decision. Because the price of this instrument is objective for our common people's surnames, I will be cautious.