THERMOSTATIC HEATING】- Our neck relax massager has 6 modes and 15 levels of intensity massage, if hate Acupuncture Mode, please change. It’s equipped with 107.6°F constant temperature & warm compress technique, once starting to use, it will automatically turn off within 15 minutes to avoid overheating. (Please TURN OFF the heating button if feel bad). It’s utilized a 4-point fixed heating design through 3D metal pads to improve the massage effect