1. Three levels of adjustment: three levels of adjustable angles, the back arch angle can be adjusted as needed to meet the needs of waist training 2. Function: Equipped with 88 massage points corresponding to the body acupoints. It can massage the lumbar spine when stretched and can correct the sitting posture when sitting. 3. Material used: made of high-quality ABS plastic, environmentally friendly, tough and tough, pressure-resistant, compact and portable design, easy to carry 4. Matching use: There is a soft sponge pad in the middle, which can cushion the impact and provide better protection for the waist 5. Applicable places: Whether lying down or sitting, you can use this massager, suitable for home, office, car.