Unfortunately, I was fooled by the advertisement of the factory and the customers hired on the factory website and bought one. Proved by use: not only has no curative effect, but it may aggravate the condition if you are not careful! Secondly, this so-called therapeutic instrument is just an inflatable balloon, and other types are physiotherapy supplies. In the "People's Pharmacy" and other major pharmacies, the price is only about 100 yuan. However, unscrupulous profiteers, flaunting "the state that the United States treats the natural bending posture of cervical vertebrae", hacked patients with child care and many dazzling pictures, and also priced their inferior products at 698 yuan! My credulity can be used as a reference warning for all patients!