How to use: 1: After opening the retractor Velcro, tilt your head slightly upward and wear it on your neck; 2: Rotate the front button to adjust to your comfortable height; 3: Adjust the buttons at the back to your comfortable tightness; 4: Connect the air inlet of the tractor to the air pump; 5: Manually pump it up and stop when you feel the comfort of your neck; 6: After use, deflate its gas with an air pump and store it well. 360 DEGREE DECOMPRESSION AND RELAXTION: lock the neck and stretch the cervical spine, correction of the mandible and clavicular cervical curvature,let the damaged cervical vertebra get full rest to reduce oppression INFLATABLE TRACTION DEVICE: support the cervical spine,intervertebral space is evenly distracted,let the cervical spine be in a state of natural curvature to relax the muscles of the neck and back CORRECTOR NECK POSTURE: attention to computer, touch pad and cell phone users keep your head up! It helps prevent forward-and-down head motion when using laptop or mobile devices and stretches stiff muscles around the neck and shoulders area to help correct and maintain proper neck posture and more useful in daily life walkinglearning,watch tv,travel ,sprain,stiff neck,office worker COMFORTABLE AND BREATHABLE: stable structure,adjustable from your own, easy to clean for easy removal,explosion-proof Reminder: This product can not replace the medicine, as well as the correct diagnosis and treatment of the doctor.