Multi-position adjustment arch for you with back pain. Equipped with 88 massage projections, corresponding to the body's acupuncture points, massages your spine while stretching. You can use it while sitting, help you correct your sitting posture and massage your spine. Helps relieve chronic back pain, correct postural imbalance, restore the natural curvature of the back. Improves the flexibility of the shoulder and back muscles. Made of fine quality ABS plastic, environmentally friendly, tough, pressure-resistant, compact and portable design can be neatly placed in the luggage. With soft rubber mat in the middle, cushion impact force, give the waist better protection. Three different levels can be adjusted, giving you better treatment. Ease back pain, improve posture, increase range of motion and flexibility Simple and user-friendly, adjustable and portable, it can be used wherever you want. It is small, lightweight, equipped with multiple modes, which can help you relax and instantly relieve back pain due to tight muscles, excessive flexion and poor spine. You can just lie down and relax for five minutes twice a day. This back massager is recommended and used by doctors, chiropractors and professional athletes. The back massager is designed to stretch your back, simple, safe. Preventive care for the spine, easy to use for home treatment for back problems. A thoughtful gift for family and friends. Specifications: Name: Lumbar Spine Massager Stretcher Material: ABS plastic + rubber Color: Purple, Blue and Green Three-level heights: 70mm / 2.76in, 90mm / 3.54in, 110mm / 4.33in Base length: 385mm / 15.16in Maximum acceptable weight: 250000g / 551.16lb