1. The wireless charger with a price of 80 yuan is an electronic device that can wirelessly transmit power to mobile devices that support wireless charging. 2. The wireless charger with a price of 80 yuan is usually composed of a set of coils and electronic circuits, which can convert the AC electrical signal into a high-frequency radio magnetic field, and then transmit power to the mobile device through the induction principle. 3. In addition to the wireless charging function, some wireless chargers with a price of 80 yuan also have functions such as fast charging and security protection, which can improve the user's charging experience.