This product is designed according to the principles of ergonomics and can easily massage shoulder, back, waist and other parts (acupoints and sore places). The massager adopts the shape of a trolley, 20 rollers are enough to spread all over every inch of skin, and the massage point adopts the design of mold batch finger pressure to stretch the tense muscles and muscles, reducing the tension and pressure of the human body! It is a must-have massage.