1、Thirty levels of massage strength can be adjusted to meet your different needs. 2、With a high frequency cooling fan to cool the machine so that can extended the service life. 3、With 6 replaceable physiotherapy heads can be used to massage different parts of the body. 4、Stimulating the normal function of nerve cells and organs to quickly recover your body. 5、Perfect for joint relief, cervical spine adjustment, thoracic spondylosis, cervical spondylosis and body treatment. Item Type: Electric Spine Massager Material: ABSStrength: 30 Levels, which are 50N, 100N, 150N, 200N, 250N, 300N, 350N, 400N, 450N, 500N, 550N, 600N, 650N, 700N, 750N, 800N, 850N, 900N, 950N, 1000N, 1050N, 1100N, 1150N, 1200N, 1250N, 1300N, 1350N, 1400N, 1450N, 1500N. Frequency: 5 Gears to be adjusted, which are low frequency, medium frequency, high frequency, super frequency, variable frequency. Efficacy: 1. Body massage: provide stable and powerful force, more effective and comfortable massage. 2. Suitable for scoliosis, thoracic and spine soreness, and can be used for joint relief, cervical spine adjustment, thoracic spine massage, cervical spine massage, body massage and health care. 3. The principle of physical pressure massage: imitate human hand massage, adjust bones, straighten the spine, immediately dredge upright, get rid of pain, and make people refreshed and energetic. It can be in contact with the skin under 2.3cm to effectively adjust the bones and massage once to make the relaxation time longer. Will provide stable and powerful strength, more effective and more comfortable. Applicable Symptoms: 1. Cervical syndrome: headache, dizziness, insomnia, limited neck mobility, neck pain, arm numbness, neck movement disorder. 2. Thoracic syndrome: back pain, shortness of breath, poor appetite, gastrointestinal disorders. 3. Lumbar syndrome: acute and chronic low back pain, lumbar disc herniation, legs and feet numb. 4. Pelvic syndrome: sacroiliac joint subluxation, sciatica, toe feet. 5. Scoliosis: the prevention of regressive lesions of the conventional spine health. Contraindication: 1. The eyes and the surrounding area, the myocardium, the spinal cord, the gonads, the kidneys and the liver. 2. Blood disorders, coagulation problems or the use of anticoagulants. 3. Polypus in the area of treatment. 4. Thrombosis. 5. Tumor diseases. 6. Polyneuropathy. 7. Growing cartilage in children. 8. Therapy using corticoids. 9. Inapplicable on areas in proximity to large nerve bundles, bundles, blood vessels, the spinal cord and the head. 10. Heart disease, diabetes, pregnant women, and other major diseases. How to Use: 1. Select the appropriate massage head and install it. 2. Power on, press the button "ON/OFF" to start up, press again to shut down. 3. Adjust the hitting speed, short press the button "frequency", the screen displays the corresponding hitting speed "low frequency" or "medium frequency" or "high frequency" or "super frequency" or "variable frequency", according to the need to select the appropriate hitting speed. 4. Adjust the maximum number of consecutive hits for a single time by pressing the key "The Number of". The screen displays the corresponding hit times of "10 times" or "20 times" or "30 times" or "unlimited". 5. Adjust the single hitting force, short press the button "Efforts to+" or "Efforts to‑", the screen displays the corresponding hitting force, according to the need to choose the appropriate hitting force. 6. Put the massage head on the hit part, press the trigger do not loosen, hit until the the setting hit times end. 8. To replace the massage head, you must turn off the machine first, and the use steps are the same as above. 1 x Electric Spine Massager 6 x Physiotherapy Heads 4 x Protective Covers 4 x Gum Covers 1 x Instruction