As Comfortable as a Hot TowelL:Neck Massager Built-in new thermostat, Fahrenheit warmly penetrates neck skin, deeply relaxes neck muscles. Use for 15 minutes each time. Use twice a day. Relieve neck pain throughout the day.CERVICAL SPINE MASSAGE EFFECT IS REMARKABLE: Neck Massager use electrical impulses transmitted to deep skin,and use electrical impulses simulation variety of massages to achieve deep relaxation of cervical spine.INTENSITY TO RELIEVE NECK PAIN:heat function adjustments on the remote control, very easy to operation. The skin-friendly, breathable soft silicone material makes the carotid artery pressure-free. U-shaped neck wraps closer to the skinfit neck size and neck curve of different people.LIGHT AND THIN TO WEAR COMFORTABLYSay goodbye to the bulky neck massager, and has a large-capacity battery. It is compatible with USB charging for 1hours, used for 15 minutes per day, which can work last 10 days,The neck massager is equipped with a 15-minute auto-off function to ensure you a safe massage experience.SAFE TO USE: This neck massager uses electrical impulses therapy. Do not use when implantation of pacemakers or carrying metal in the body is prohibited,Due to the use electrical impulses therapy, When you use it , you may feel an electric shock, which is normally. it's can relax muscles deeper than traditional massage, IF YOUR NECK IS DRY, before use please wipe neck with a wet towel and use experience it better.