Feature: 1. Heat resistance, low temperature strength, good mechanical properties. 2. Correction of spine, treatment of cervical spondylosis, thoracic vertebra disease, lumbar disc herniation. 3. Delay bone aging. Built-in high frequency cooling fan, to extend the service life. 4. Exquisite workmanship, precise and durability, made of stainless steel material. 5. Improve joint pain, spasm and other symptoms, care for your health. 6. Can be used for body shaping, improve hunchback, torticollis, hip, etc. 7. Four types of massage heads are replaceable, meet your needs. 8. Can change the head, multi-purpose, can meet the needs of different people. Product parameter Product color: Grey product weight: 0.75kg Product Size: 23*20*9.cm Function: 1. Cervical syndrome: headache, dizziness, insomnia, limited neck mobility, neck pain, arm numbness, neck ovement disorder. 5. Lumbar syndrome: acute and chronic low back pain, lumbar disc herniation, legs and feet numb.