1. Acupoint Massage: Energy magnet, acupoint massage, stretching massage, easy waist protection.     2. Waist Massage: Stretching, massage, magnet treatment, 15 minutes a day, enjoy waist massage at home.     3. Reversible: One side of the waist massager is magnet care and the other side is acupoint massage.     4. ABS Polyurethane Material: Use environmentally friendly ABS polyurethane, non toxic and durable. Magnets to protect the lumbar spine, massage the acupoints while stretching.     5. Ergonomic: Designed according to ergonomics, fits the waist, giving you a more comfortable massage experience.         Specification: Item Type: Back Stretcher     Material: ABS, magnet     Function:      Lying: Flexible traction gradually opens the lumbar intervertebral space and returns to the normal physiological curve     Sitting: Help correct sitting posture, massage the waist, and stretch the lumbar spine     Applicable People: Sedentary discomfort, waist cold, sports damage, housework fatigue     Assembly method:      1. Place the base and arched board on a flat mat or carpet.     2. The arch plate is slightly bent before installation for easy installation.     3. Kneel on the end of the base with your knees, and insert one end of the arched plate into the slot at the end of the base     4. Grasp the arched board with both hands     5. Press down with your fingers, and slowly insert the top of the arched plate into the position of the first gear of the base.     Instructions:     This product is specially designed for users who need to solve back problems     Regardless of your physical condition, please start from the first gear     When your body's flexibility improves, you can try the second and then the third.     Familiarize yourself with the main practice positions shown in the operating instructions.     In a comfortable posture, every 5 minutes, it is recommended to do it only twice a day.     If it is difficult for you to use it for 5 minutes at the beginning, please stop temporarily and gradually increase to 5 minutes through later practice.     The key is to relax, take a deep breath and exhale slowly to let the body sag naturally     High level exercise can indeed make the body stretch to a greater extent, but it is only recommended for very experienced and flexible users, such as yoga practitioners and gymnasts.     If you feel discomfort when you first use it, it is usually caused by the stretching of the back muscles. After a period of time, the discomfort will gradually decrease.     After using this product, the body feels very uncomfortable or the symptoms do not improve after using this product for a period of time. Please stop using it and consult a doctor immediately.