The difference from the traditional cervical traction: The traditional traction treatment is performed by traction beds or slings in the hospital which is expensive and restricts us greatly during the treatment process. A new generation of three-power cervical retractor with airbag support watch TV do housework and work at home. The difference from the traditional cervical retractor 2: Working principle: Through the upward 20-degree arc thrust the intervertebral space is opened the intervertebral disc that protrudes and compresses the nerve is restored to its original position and the compression is relieved. It is not the traditional reverse traction or straight traction. This is the opposite of cervical curvature. You may feel a little pain which is normal. Targeted Heat Therapy: When you choose to use a USB heating pad the neck heating pack provides comfortable heat therapy helps blood circulation soothes nerves and neck pain ideal for neck pain sprains and strains muscle pain Post-operative rehabilitation and neck injury support. Can be used in the office at home and while traveling. Especially suitable for students teachers office workers and the elderly who are prone to neck pain. Applicable people + Reasonable effect after use: Measure your neck before purchasing. Height Range: 3.2-4.7 inches Neck Circumference: 13.7 - 17.5 inches. Designed for regular neck sizes not for thick necks. Using it for 15-30 minutes every day for a period of time can relieve nerve compression and cervical spine pressure dizziness weakness of limbs hand numbness nausea and other symptoms. And smooth nerves and neck soreness great for neck soreness sprains and strains muscle pain post-operative rehabilitation and neck injury support. Can be used in the office at home and while traveling. Especially suitable for students teachers office workers and the elderly who are prone to neck pain. Applicable people + Reasonable effect after use: Measure your neck before purchasing. Height Range: 3.2-4.7 inches Neck Circumference: 13.7 - 17.5 inches. Nausea and other symptoms.