I think I have the most say in this matter. In fact, whether it is worth the price depends on how you look at it. You will understand when I explain the principle. Sound waves are actually sounds with a frequency of 200 MHz to 2000 Hz. It is well known that amplification and audio processing are realized by circuits. Then, the sound will be played through an 8 ohm 2W ordinary speaker. Usually, you should test your microcirculation first when you experience it. They will tell you that your microcirculation is not good. In the process of sound wave therapy, if you use microcirculation to test, there will be obvious changes. I tell you, you can do a test. I think everyone has a mobile phone. Download a light music with your mobile phone, play it with headphones and stick it on your palm. At this time, you can use microcirculation to test your blood flow. Probably better than sound waves. What is the reason? Because every part of human internal organs will produce a specific frequency. So as long as there is sound around, the microcirculation will change at this time. Then the sound will adjust the body. Listening to songs is also a waterfall. Now you can know whether it is worth it.