1、 Relieving itching and swelling: The built-in linear motor has a fast response speed and low power consumption. It can massage the bite area comfortably to relieve itching, effectively promote blood circulation and local blood flow in the bite area, and speed up the effect of relieving itching. 2、 Principle: The top is made of MCH ceramic material, which generates fast and uniform heat, and is more energy-efficient than ordinary ceramics under the same heating effect. The safe material has a delicate texture, which is comfortable and non-irritating when it fits the skin. 3、 Temperature adjustable: 40 ℃ and 45 ℃ two temperature adjustable, click the child mode, 4 seconds to automatically stop. Double-click the adult mode, it will stop automatically in six seconds. 4、 Reusable: Built-in 200mAh rechargeable lithium battery, one full charge can be used 100 times, flexible and convenient to adapt to a variety of charging methods, it can be fully charged in 30 minutes. 5、 Ultra-small and convenient: The design of the anti-itch device is very light and portable. The device is small in size and light in weight. Suitable for home, travel, and outdoor use.