1Humanized heating part design, protect the neck, waist and abdomen three parts that are easy to catch cold. 2Safety, needs to be connected to mobile power supply when heating, 5V power supply, stable performance, safety and durability, far lower than human 36V standard. 3Science and technology temperature control design, double layer heat preservation, three temperature control, 5 seconds heating. 4The internal heating wire is fibrewire, unlike copper wire, which conducts electricity. 5Washing machine can be cleaned freely (unplug the power when washing).