The first picture is a product picture, the other pictures are sample displays Note: The actual packaging box may be different from the one shown in the picture Stretch Equipment Back Massager Lumbar Support Relaxation Spinal Pain Relieve Spine Corrector   Product Description:  This product relies on the principle of arc stretching, can help you solve the waist pain, fatigue, waist weakness, waist stiffness, lumbar discomfort\'problems, extend your waist muscle lines. Features: The 3 gear can be adjusted, and the back bow angle can be adjusted according to needs, so as to suit waist exercise needs. Simulation finger massage, acupuncture touch, advanced PP material, durable. Arc stretching, for laying and sitting. Specifications: Material:PP Product function: correcting spine, improving hunchback / waist acid Instructions: 1. Put the spinal correction plate on the bed or stall, adjust the appropriate tensile strength. 2. Place the spinal correction plate behind the buttocks, and the rear part of the product faces the buttocks. 3. Lie down slowly. 4. Correct posture: sideways and arm support.