Use safety materials, heat evenly, and have high safety, no need to worry about insufficient heat or overheating and burns.Switching position, three-speed constant temperature 45-65 degrees, freely adjustable .10 seconds of rapid heating, rapid heat generation, no need to wait.USB charging,it can be connected to power, computer and charging treasure.Product Include:1*Warm&massager Belt1*USB Cable1*ManualProhibited people:Patients with severe heart disease are prohibited from using moderate and severe cardiovascular diseases.It is forbidden to use for patients with skin sensation disorders or skin abnormalities.It is forbidden to use it for patients who suffer from gout or have not fully recovered from gout during the onset of the disease.Patients with cervical cancer are prohibited from using it.Prohibit pregnancy.prompt:It is recommended not to use it at a high temperature of more than 8 minutes, and each extension of use time should not exceed 30 minutes.The recommendation for sensitive skin is to use it through clothing.